Answer:
To find the radius of the circle inscribed in an isosceles triangle, we can use the following formula:
r = (a/2) * cot(π/n)
where r is the radius of the inscribed circle, a is the length of one of the equal sides of the isosceles triangle, and n is the number of sides of the polygon inscribed in the circle.
In this case, we have an isosceles triangle with two sides of 5cm and one side of 6cm. Since the triangle is isosceles, the angle opposite the 6cm side is bisected by the altitude and therefore, the two smaller angles are congruent. Let x be the measure of one of these angles. Using the Law of Cosines, we can solve for x:
6^2 = 5^2 + 5^2 - 2(5)(5)cos(x)
36 = 50 - 50cos(x)
cos(x) = (50 - 36)/50
cos(x) = 0.28
x = cos^-1(0.28) ≈ 73.7°
Since the isosceles triangle has two equal sides of length 5cm, we can divide the triangle into two congruent right triangles by drawing an altitude from the vertex opposite the 6cm side to the midpoint of the 6cm side. The length of this altitude can be found using the Pythagorean theorem:
(5/2)^2 + h^2 = 5^2
25/4 + h^2 = 25
h^2 = 75/4
h = sqrt(75)/2 = (5/2)sqrt(3)
Now we can find the radius of the inscribed circle using the formula:
r = (a/2) * cot(π/n)
where a = 5cm and n = 3 (since the circle is inscribed in a triangle, which is a 3-sided polygon). We can also use the fact that the distance from the center of the circle to the midpoint of each side of the triangle is equal to the radius of the circle. Therefore, the radius of the circle is equal to the altitude of the triangle from the vertex opposite the 6cm side:
r = (5/2) * cot(π/3) = (5/2) * sqrt(3) ≈ 2.89 cm
Therefore, the radius of the circle inscribed in the isosceles triangle with sides 5cm, 5cm, and 6cm is approximately 2.89 cm.
Lyla invests $2,500 into a savings account
which earns 5% per year. In 15 years, how
much will Lyla's investment be worth if interest
is compounded semiannually (twice a year)?
Round to the nearest dollar.
Answer:
We can use the formula for compound interest to find the future value of Lyla's investment:
A = P(1 + r/n)^(nt)
where A is the future value, P is the principal (initial investment), r is the annual interest rate as a decimal, n is the number of times interest is compounded per year, and t is the time in years.
Substituting the given values, we get:
A = $2,500(1 + 0.05/2)^(2*15)
Simplifying, we get:
A = $2,500(1.025)^30
Using a calculator, we get:
A ≈ $5,016.35
Therefore, Lyla's investment will be worth approximately $5,016.35 in 15 years if interest is compounded semiannually. Rounded to the nearest dollar, the answer is $5,016.
Cyndi is making a mixture of cashews and peanuts the cashews are $7 per pound and $3 a pound for peanuts. Cyndi wants 20 pounds of the mixture which will cost $5.40 per pound .. what's the system and how much would she need to equal $108
The amounts of each substance needed to obtain a mixture of 20 pounds at a price of $5.4 per pound is given as follows:
Cashews: 12 pounds.Peanuts: 8 pounds.How to obtain the amounts?The amounts are obtained by a system of equations, for which the variables are given as follows:
Variable x: amount of cashews.Variable y: amount of peanuts.The mixture has a total of 20 pounds, hence:
x + y = 20.
y = 20 - x.
The total cost of the mixture is of $108, as 108/20 = 5.4, hence:
7x + 3y = 108
Replacing the second equation into the first, the value of x is given as follows:
7x + 3(20 - x) = 108
4x = 48
x = 12.
Then the value of y is given as follows:
y = 20 - 12
y = 8.
More can be learned about a system of equations at https://brainly.com/question/30374328
#SPJ1
there are 30 cupcakes in a tin. 16 of the cupcakes are iced of which 3 contain walnuts. 5 cupcakes are neither iced nor contain walnuts. work out the probability that the cupcake picked at random contains walnuts
The probability that the cupcake picked at random contains walnuts is given as follows:
0.4 = 40%.
How to calculate a probability?A probability is calculated as the division of the desired number of outcomes by the total number of outcomes in the context of a problem/experiment.
There are 30 cupcakes in a tin, hence the total number of outcomes is given as follows:
30.
The number of cupcakes with walnuts is given as follows:
3 that are also iced.30 - (16 + 5) = 9 that are not iced.Hence the probability that the cupcake picked at random contains walnuts is obtained as follows:
p = (3 + 9)/30
p = 12/30
p = 0.4.
More can be learned about probability at https://brainly.com/question/24756209
#SPJ1
The perimeter of a rectangle is 343434 units. Its width is 6.56.56, point, 5 units.
Write an equation to determine the length (l)(l)left parenthesis, l, right parenthesis of the rectangle.
The length of the rectangle is 10.5 units.
What is perimeter?
Perimeter is the distance of a two-dimensional shape. It is equal to the sum of the lengths of all the sides of the shape. The perimeter is measured in units, such as centimeters, meters, feet, or inches, depending on the unit of measurement used for the dimensions of the shape.
The perimeter of a rectangle is given by the formula:
P = 2l + 2w
where P is the perimeter, l is the length, and w is the width.
In this case, we know that the perimeter is 34 units, and the width is 6.5 units. So we can substitute these values into the formula and solve for the length:
34 = 2l + 2(6.5)
Simplifying, we get:
34 = 2l + 13
Subtracting 13 from both sides, we get:
21 = 2l
Dividing both sides by 2, we get:
l = 10.5
So the equation to determine the length of the rectangle is:
2l + 2w = P
Substituting the known values, we get:
2l + 2(6.5) = 34
Simplifying and solving for l, we get:
2l + 13 = 34
2l = 21
l = 10.5
Therefore, the length of the rectangle is 10.5 units.
To learn more about perimeter visit the link:
https://brainly.com/question/397857
#SPJ9
Complete question: The perimeter of a rectangle is 34 units, its width is 6.5 units. Write an equation to determine the length (l) of the rectangle.
Find a1 in the geometric series Sn=3045, r=2/5, and an=120 Please help this is due at 11:59 pm TONIGHT! Remember to show work!
Answer:
a1 = 1875
Step-by-step explanation:
You want a1 for the geometric series that has r = 2/5, an = 120, and Sn = 3045.
Series relationsThe n-th term of the geometric series with first term a1 and common ratio r is ...
an = a1·r^(n-1)
The sum of the first n terms of the geometric series is ...
Sn = a1·(r^n -1)/(r -1)
ApplicationWe can use the expression for an to substitute for r^n in the sum equation:
[tex]a_n=a_1(r^n)(r^{-1})\\\\r^n=\dfrac{a_n}{a_1r^{-1}}=\dfrac{a_nr}{a_1}\\\\S_n=a_1\dfrac{r_n-1}{r-1}=a1\dfrac{\dfrac{a_nr}{a_1}-1}{r-1}\\\\S_n=\dfrac{a_nr-a_1}{r-1}\\\\a_1=a_nr-S_n(r-1)=a_nr+(1-r)S_n\\\\a_1=(120)\dfrac{2}{5}+(1-\dfrac{2}{5})(3045)=\dfrac{2\cdot120+3\cdot3045}{5}\\\\\boxed{a_1=1875}[/tex]
__
Additional comment
The sum is of the first four terms:
1875 +750 +300 +120 = 3045
We can also find this by working backward. The previous term is 5/2 times the current term. We need to find the terms that have a sum of 3045.
120 +300 +750 +1875 +4687.5 +...
Clearly, 5 terms is too many. The sum of the first 4 terms of the backward series is 3045, so we know n=4 and the first term is 1875—the last term of our 4-term backward series.
please please i’m begging someone help
Using ratios, we can find the average weight of the adult bear to be 250 pounds and the angles of the triangles are 10°, 75° and 95°.
What are ratios?Comparing two amounts of the same unit and calculating the ratio allows us to determine how much of one quantity is included in the other. Two categories of ratios exist. The part to whole ratio is one, and the part-to-part ratio is another. The part-to-part ratio illustrates the relationship between two separate entities or groupings.
In the question given,
Ratio between birth weight and adult weight of a bear is 3:1000.
The average birth weight as given here is = 12 ounces.
Now let the average adult weight be = x
According to the ratio,
12/x = 3/1000
⇒ 3x = 12000
⇒ x = 4000 ounces.
Now 16 ounces = 1 pounds
4000 ounces
= 4000/16
= 250 pounds.
The angles are in the ratio 2:15:19
Now we know all the angles sum up to 180°
Let the angle be = x.
The equation is as follows:
2x + 15x + 19x = 180
⇒ 36x = 180
⇒ x = 180/36
⇒ x = 5
So, all the angles of the triangles are, 10°, 75° and 95°.
To know more about ratio, visit:
https://brainly.com/question/23499990
#SPJ1
Ella has an offer to buy an item with a sticker price of $12,300 by paying $420 a month for 36 months. What interest rate is Ella being offered?
Answer:
To calculate the interest rate, we can use the formula for the present value of an annuity:
PV = PMT x [(1 - (1 + r)^(-n)) / r]
where:
PV = present value
PMT = monthly payment
r = interest rate per period
n = number of periods
In this case, we have:
PV = $12,300 (the sticker price)
PMT = $420
n = 36 (36 months)
Substituting these values into the formula, we get:
12,300 = 420 x [(1 - (1 + r)^(-36)) / r]
Simplifying this equation algebraically is not possible, so we need to use numerical methods to solve for r. One way to do this is to use a financial calculator or spreadsheet program, which can find the interest rate that makes the equation true. Using Excel's RATE function, for example, we get:
=RATE(36,-420,12300)
This gives us an interest rate of approximately 3.33% per month or 39.96% per year.
Therefore, Ella is being offered an interest rate of 3.33% per month or 39.96% per year.
the angle has 4x and 6x what is the measurement of the angle
The sum of the measures of the two angles is 180 degrees, as they are angles of a straight line. The measure of the first angle is 4x = 72 degrees, and the measure of the second angle is 6x = 108 degrees.
What is angle ?
A measure of rotation of two crossing lines or planes in mathematics is called an angle. Angles are frequently defined as degrees or radians. Two lines or splines intersect at a location, known as the apex of the angle, to produce an angle. The edges of the angle are the two lines and line segments. According to its measurement, an angle can be categorized as: An acute angle is one that ranges from 0 to 90 degrees. Right arc: an angle that is 90 degrees in length. A measureable angle intermediate 90 and 180 degrees is referred to as an obtuse angle. 180 degree angle is referred to as a straight angle.
The sum of the measures of the two angles is 180 degrees, because they are angles of a straight line. Therefore:
4x + 6x = 180
Simplifying the left-hand side, we get:
10x = 180
Dividing both sides by 10, we obtain:
x = 18
So the measure of the first angle is:
4x = 4(18) = 72 degrees
And the measure of the second angle is:
6x = 6(18) = 108 degrees
To know more about angles visit:
brainly.com/question/14569348
#SPJ1
The complete question is: What is the measurement of an angle if its measure is 4x and another angle's measure is 6x?
Find a fraction that is equivalent to 5/7 and its denominator is 9 less than twice its numerator.
5/7=
The fraction that is equivalent to 5/7 is 15/21
How to determine the fraction?It is important to note that fractions are simply described as part of a whole number or element.
Also, equivalent expressions are defined as expressions that have the same solution but differ in the mode of arrangement of the values.
From the information given, we have;
The numerator be x
The denominator is 9 less than twice the numerator
This is represented as;
x/2x - 9 = 5/7
Cross multiply the values, we have;
7(x) = 5(2x - 9)
expand the bracket
7x = 10x - 45
collect the like terms, we have;
7x - 10x = -45
-3x = -45
Make 'x' the subject
x = 15
Then, the fraction = 15/21
Learn about fractions at: https://brainly.com/question/78672
#SPJ1
Consider a circle whose equation is x2 + y2 – 2x – 8 = 0. Which statements are true? Select three options. The radius of the circle is 3 units. The center of the circle lies on the x-axis. The center of the circle lies on the y-axis. The standard form of the equation is (x – 1)² + y² = 3. The radius of this circle is the same as the radius of the circle whose equation is x² + y² = 9.
Answer:
To determine which statements are true, we can use the standard form of the equation of a circle:
(x - h)^2 + (y - k)^2 = r^2
where (h, k) is the center of the circle and r is the radius.
Using this form, we can rewrite the given equation as:
(x - 1)^2 + y^2 = 3^2 + 1^2 = 10
Comparing this to the standard form, we can see that the center of the circle is (1, 0), so the statement "The center of the circle lies on the x-axis" is true. However, the statement "The center of the circle lies on the y-axis" is false.
To find the radius, we can rearrange the equation as follows:
x^2 - 2x + y^2 = 8
Completing the square for x, we get:
(x - 1)^2 + y^2 = 9
This shows that the radius of the circle is 3, so the statement "The radius of the circle is 3 units" is true, as well as the statement "The radius of this circle is the same as the radius of the circle whose equation is x² + y² = 9."
Therefore, the three true statements are:
1.The radius of the circle is 3 units.
2.The center of the circle lies on the x-axis.
3.The radius of this circle is the same as the radius of the circle whose equation is x² + y² = 9.
Step-by-step explanation:
hope its help <:
Adam is finding 10 less than 708 mentally. He thinks the tens digit and the hundreds digit will change. He gets 698 for his answer. Is Adam's thinking correct? Explain.
Answer:
Adam's thinking is not correct.
When subtracting 10 from 708, we need to borrow 1 from the hundreds digit and add it to the tens digit. This will result in a new hundreds digit of 6 and a new tens digit of 9. The ones digit remains the same. Therefore, the correct answer would be 698.
Adam's answer is also 698, but his reasoning is incorrect. He thinks that both the tens and hundreds digits change, which is not the case. In reality, only the tens digit changes while the hundreds digit decreases by 1 due to the borrowing process.
thank me by marking my answer as brainliest!
Mar 09, 1:56:27 PM
In a certain Algebra 2 class of 28 students, 11 of them play basketball and 13 of them
play baseball. There are 11 students who play neither sport. What is the probability
that a student chosen randomly from the class plays both basketball and baseball?
Answer:
Submit Answer
attempt 1 out of
The probability of choosing a student who plays both basketball and baseball is approximately 0.4643.
What is probability?It is a number between 0 and 1, where 0 means the event is impossible and 1 means the event is certain to occur.
According to question:We can use the inclusion-exclusion principle to find the number of students who play both basketball and baseball.
Number of students who play both = Number of basketball players + Number of baseball players - Number of students who play neither
= 11 + 13 - 11
= 13
Therefore, out of 28 students, 13 play both basketball and baseball.
The probability of choosing a student who plays both sports can be calculated as follows:
P(plays both) = Number of students who play both / Total number of students
= 13/28
= 0.4643 (rounded to 4 decimal places)
So the probability of choosing a student who plays both basketball and baseball is approximately 0.4643.
To know more about probability visit:
https://brainly.com/question/19089353
#SPJ1
June is driving from Brookline, Massachusetts, to Brooklyn, New York. The cities are 200 miles apart. Pretend June lives in a world in which she encounters no traffic jams and can drive at a constant speed of 50 mph the entire way. The distance June has traveled, c, is a function of her driving time, t Write a formula that describes this function.
This function's definition is given by the formula [tex]c = 50t + 200[/tex].
What pace is it moving at?Consider how many individuals and gadgets will be utilizing the network at once as well as how it will be utilized before choosing the "optimal" speed for your home. As a general rule, anything that can connect many devices simultaneously and is above 200 Mbps is regarded as "fast" internet.
What would you define speed as?Speed, which is a scalar number, is the "speed at which an item is moving." The pace at which an item travels a distance may be referred of as its speed. A fast-moving item travels at a great velocity and completes a significant distance in a brief period of time.
[tex]y = mx + b[/tex]
Where [tex]y,x[/tex] are variables, m is the rate of change and [tex]b[/tex] is the y intercept.
Let [tex]c[/tex] represent the distance June has traveled after time [tex]t[/tex].
Since the cities are [tex]200[/tex]miles apart, hence [tex]b = 200[/tex]. Also the speed is [tex]50[/tex]mph, hence [tex]m = 50[/tex]:
[tex]c = 50t + 200[/tex]
The formula that describes this function is [tex]c = 50t + 200[/tex]
To know more about speed visit:
https://brainly.com/question/26899146
#SPJ1
100 points and brainliest
Find all the missing angles:
Answer:
<AOB = 112
<AOD = 68
<DOC = 112
Hoped this helped
: )
There is a park near Raphael’s home. To find its area, Raphael took the measurements shown. Select all the true statements about the area of the park.
(a)The park can be decomposed into two parallelograms.
(b)The formula A = bh can be used to find the area of each piece of the park.
(c)The park can be decomposed into a parallelogram, a triangle, and a trapezoid.
(d)The area of the park is 126 m2.
(e)The area of the park is 96 m2.
Answer:
A, C, and D
Step-by-step explanation:
If you split the shape right along the bottom of the first part, you get two parallelograms. If you split it like you split it the first time and then split it along the side of the bottom parallelogram you get a triangle, a parallelogram, and a trapezoid. Then, because the area of a parallelogram is A=bh, you can substitute the numbers in. 5*12=60 and 6*11=66. However, this is not all, remember to add the area together! 60+66=126 so D is also true.
Hope this helps!
What is the value of x in (x+3)^2=49 show your work
Answer:
x = 4,-10Step-by-step explanation:
(x+3)^2=49
x+3=√(49)
x+3=√(7^2)
x+3=7
x+3-3=7-3
x=4x+3=-√(49)
x+3=-7
x+3-3=-7-3
x=-10x = 4,-10
If the diameter of a circle is
30
30 centimeters, what is the radius of the circle?
Answer:
15 centimeters
Step-by-step explanation:
radius is half of the circles diameter
If 720,000 is the result when 7__1,846 is rounded to the nearest ten thousand, what could be the missing digit?
Answer: the missing digit would be 2
721,846 rounded to the nearest ten thousand is 720,000
Write the letter of the definition next to the matching word as you work through the
lesson.
Altitude is in a polygon, a perpendicular segment from a vertex to the opposite side or to the line containing the opposite side.
What is Hypotenuse?In geometry, the hypotenuse is the longest side of a right-angled triangle, opposite to the right angle. It is also the side that connects the two other sides, which are called the adjacent and opposite sides.
According to question:Altitude: In a polygon, a perpendicular segment from a vertex to the opposite side or to the line containing the opposite side.Geometric mean: for two positive numbers, a and b, the positive number x that satisfies a/x = x/b.Hypotenuse: The side of a right triangle that is opposite the right angle and is always the longest side of the triangle.Leg: In a right triangle, either of the two sides forming the right angle.One of the key properties of the geometric mean is that it is always less than or equal to the arithmetic mean (the regular average) of the same set of numbers, except when all the numbers are equal.
The geometric mean is used in various fields such as finance, economics, biology, and physics. It is particularly useful in situations where values are subject to compounding or exponential growth, and where small changes in values can have a significant impact over time.
To know more about hypotenuse visit:
https://brainly.com/question/11958431
#SPJ1
in which place is the first digit of the quotient: 3,587 ÷ 18
Answer: The quotient is 199.277777778, the answer is the hundreds place
Step-by-step explanation:
199.277777778, the 1 in 199 is in the hundreds place :)
The perimeter of a rectangle is 34 units. Its width is 6.5 units.
Write an equation to determine the length of the rectangle
Given:
P = 34 [Perimeter]
W = 6.5 {let's use W and L to make it easy to read]
Also known:
P = W + L + W + L = 2(W+L)
Fill in values:
34 = 2(6.5+L) [NOTE: This is an equation to determine the length (L) of the rectangle."]
17 = 6.5 + L [NOTE: This is a simplified form of the above equation.]
10.5 = L [NOTE: This is the solution (the value of L)]
Find the length of side x to the nearest tenth.
Given:-
A right angled triangle is given to us .Two angles are 45° , longest side is 5 and another side is "x" .To find:-
The value of x .Answer:-
In the given right angled triangle, we may use the trigonometric ratios. We can see that the measure of the longest side is 5 which is hypotenuse and the measure of perpendicular needs to be find out .
We may use the ratio of sine here as , we know that in any right angled triangle,
[tex]\implies\sin\theta =\dfrac{p}{h} \\[/tex]
And here , p = 5 and h = x , so on substituting the respective values, we have;
[tex]\implies \sin\theta = \dfrac{x}{5} \\[/tex]
Again here angle is 45° . So , we have;
[tex]\implies \sin45^o =\dfrac{x}{5} \\[/tex]
The measure of sin45° is 1/√2 . so on substituting this we have;
[tex]\implies \dfrac{1}{\sqrt2}=\dfrac{x}{5} \\[/tex]
[tex]\implies x =\dfrac{5}{\sqrt2}\\[/tex]
Value of √2 is approximately 1.414 . So we have;
[tex]\implies x =\dfrac{5}{1.414} \\[/tex]
[tex]\implies \underline{\underline{\red{\quad x = 3.53\quad }}}\\[/tex]
Hence the value of x is 3.53 .
and we are done!
Answer:
The length of side x to the nearest tenth is 3.5.
Step-by-step explanation:
From inspection of the given right triangle, we can see that the interior angles are 45°, 45° and 90°. Therefore, this triangle is a 45-45-90 triangle.
A 45-45-90 triangle is a special right triangle where the measures of its sides are in the ratio 1 : 1 : √2. Therefore, the formula for the ratio of the sides is b: b : b√2 where:
b is the measure of the legs opposite the 45° angles.b√2 is the longest side (hypotenuse) opposite the right angle.We have been given the hypotenuse, so:
[tex]\implies b\sqrt{2}=5[/tex]
Solve for b:
[tex]\implies \dfrac{b\sqrt{2}}{\sqrt{2}}=\dfrac{5}{\sqrt{2}}[/tex]
[tex]\implies b=\dfrac{5}{\sqrt{2}}[/tex]
The side labelled "x" is one of the sides opposite the 45° angles, so:
[tex]\implies x=b[/tex]
Substitute the found value of b into the equation for x:
[tex]\implies x=\dfrac{5}{\sqrt{2}}[/tex]
[tex]\implies x=3.5355339...[/tex]
[tex]\implies x=3.5\;\sf(nearest\;tenth)[/tex]
Therefore, the length of side x to the nearest tenth is 3.5.
Please help
Find the surface area (show work)
Answer:
148 cm²
Step-by-step explanation:
You want the surface area of a cuboid with edge lengths 4 cm, 5 cm, and 6 cm.
AreaThe formula is shown in your problem statement.
It can be made easier to compute using a little rearranging:
SA = 2LW +2LH +2WH
SA = 2(LW +LH +WH)
SA = 2(LW +H(L +W))
The choice of dimensions for L, W, and H doesn't matter.
SA = 2(4·6 +5(4+6)) = 2(24 +5(10)) = 2(74) = 148 . . . . cm²
The surface area is 148 cm².
Type the correct answer in the box.
The product of 2√3 and 3√12 in simplified form is
Answer: 36
Step-by-step explanation:
2root3 * 3root12
2*3*root3*root12
6root36
root36=6
6*6=36
please mark brainliest
Decomposing numbers to add make a new 10 adding.
29+14
29 + 14 = 44 by decomposing numbers to add and make a new 10.
Describe Decomposition of numbers?Decomposition of numbers involves breaking a number down into its constituent parts or smaller numbers that add up to the original number. This can be done in different ways depending on the purpose and context of the problem.
For example, one common way of decomposing a number is by place value. In this case, the number is broken down into its digits, which represent different powers of ten. For instance, the number 562 can be decomposed into 500 + 60 + 2.
Another way of decomposing numbers is by factoring. In this case, the number is expressed as a product of its factors. For example, the number 12 can be decomposed as 2 x 2 x 3.
Decomposing numbers is a useful skill in many areas of mathematics, including arithmetic, algebra, and geometry. It is often used to simplify problems, make computations easier, and facilitate further analysis.
To decompose 29 to make a new 10, we can break it into 9 and 20. Then, to decompose 14 to make a new 10, we can break it into 6 and 8.
So, we have:
29 + 14 = (9 + 20) + (6 + 8)
Now, we can regroup the numbers to make a new 10:
= (9 + 1) + (20 + 6) + 8
= 10 + 26 + 8
= 44
Therefore, 29 + 14 = 44 by decomposing numbers to add and make a new 10.
To know more about regroup visit:
https://brainly.com/question/29757393
#SPJ1
Solve the following quadratic by completing the square
f(x) = x^2 + 2x-12
The quadratic equation f(x) = x² + 2x - 12 can be rewritten as f(x) = (x + 1)²- 13 using the completing square method.
What is completing squares method?Completing the square is a strategy used in algebra to solve quadratic equations of the type ax² + bx + c = 0, where a, b, and c are constants and x is the variable. By converting the quadratic equation into a perfect square trinomial, the square roots of both sides of the equation may be used to quickly solve the problem. This is the core notion behind the completion of the square. The quadratic expression becomes a perfect square when we add and subtract a specific number from it to complete the square. Half of the x-term squared coefficient is equal to the sum of the numbers we add and remove.
The given function is f(x) = x² + 2x-12.
Now, group the x terms together:
f(x) = (x² + 2x) - 12
Between the parenthesis, add and remove the square of the x-half-coefficient: term's:
f(x) = (x² + 2x + (2/2)² - (2/2)²) - 12
f(x) = (x + 1)² - 1 - 12
f(x) = (x + 1)² - 13
Hence, the quadratic equation f(x) = x² + 2x - 12 can be rewritten as f(x) = (x + 1)² - 13.
Learn more about completing squares here:
https://brainly.com/question/4822356
#SPJ1
Benjamin invests money in a bank account which gathers compound interest each year. After 2years there is $658.20 in the account. After 5years there is $710.89 in the account. Work out the annual interest rate of the bank account. Give your answer as a percentage to 1 d.p.
The compound interest rate of the given information for which the annual rate of the bank account is = 3.9%.
What about compound interest?
Compound interest refers to the interest that is earned not only on the principal amount of a loan or investment but also on any interest that has been previously earned. In other words, it is the interest calculated on the initial principal and on the accumulated interest of previous periods. This compounding effect can result in significant growth over time, as the interest earned in each period is added to the principal, and the interest earned in subsequent periods is calculated on the new, larger principal amount. Compound interest is often used in long-term savings and investment accounts, such as retirement funds or fixed deposits, as it can result in a higher return than simple interest over time.
According to the given information:
In this case we know that;
⇒ A = [tex]P(1 + r)^n[/tex]
⇒ A = amount
⇒ P = principal
⇒ r = rate
⇒ n = number of years
⇒ 710.89 = 658.20[tex](1 + r)^2[/tex]
⇒ 710.89/658.20 = [tex](1 + r)^2[/tex]
⇒ 1.08 = [tex](1 + r)^2[/tex]
⇒ ln(1.08) =ln [tex](1 + r)^2[/tex]
⇒ 0.077 = 2ln[tex](1 + r)[/tex]
⇒ 0.077/2 = ln(1 + r)
⇒ ln[tex](1 + r)[/tex] = 0.0385
⇒ 1 + r = 1.039
⇒ r = 1.039 - 1
⇒ r = 0.039
⇒ r = 3.9%
To know more about interest visit:
https://brainly.com/question/14295570
#SPJ1
Quelle est l’explication de la puissance de 10
Answer:
Step-by-step explanation:
Lorsque l'exposant (a) est positif, alors la puissance de dix 10a correspond au nombre 1 suivi d'un nombre de zéros correspondant au chiffre a. Quelques exemples : 103 correspond au nombre 1 suivi de 3 zéros donc 103 = 1 000.
I want 3 halves of a cupcake for myself, 8 halves for my friend, and 7 halves for our other friend. Royalty would be great.
By adding fractions that represent each of the amounts of cupcakes, we can see that you need 9 cupcakes for you and your friends.
How many halves they need in total?Her we know that you want 3 halves of a cupcake for yourself, 8 halves for your friend, and 7 halves for your other friend.
So we just need to add all of these fractions, to do so, we need to solve the follwing opeartion:
3*(1/2) + 8*(1/2) + 7*(1/2)
3/2 + 8/2 + 7/2
All of these have the same denominator so we can directly add them up:
3/2 + 8/2 + 7/2 = (3 + 8 + 7)/2
(3 + 8 + 7)/2 = 18/2
18/2 = 9
You need 9 cupcakes for you and your friends.
Learn more about fractions at:
https://brainly.com/question/11562149
#SPJ1
Complete question:
"I want 3 halves of a cupcake for myself, 8 halves for my friend, and 7 halves for our other friend. How many halves we need in total?"
If
f
(
x
)
=
3
5
−
x
+
6
f(x)=3
5−x
+6, what is the value of
f(5), to the nearest tenth (if necessary)?
Answer:
the answer is f-1(x) = 5 - ln (x - 6)/ln (3) (I guess?)