By adding a duplicate of the identity matrix to the augmented matrix, which was formed, it is possible to find the inverse of a square matrix using row reduction.
If the matrix is capable of being reduced to the identity, the identity matrix will simultaneously change into the inverse matrix. A rectangular array of numbers, arranged in rows and columns, is referred to as a matrix. The dimension, or order, of a matrix, indicates how many rows and columns there are in the array. For example, if a matrix has m rows and n columns, its order is expressed as mxn.
Correct Question :
How do you find the inverse of a 4x4 matrix?
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⚠️ Help I don’t understand this one and it’s my last one !! ⚠️
Answer:
x=4
Step-by-step explanation:
no because x=4 and you can't have multiple answerd
Which expression is equivalent to 20x-8y?
Select the correct answer
2(10x+4y)
4(5x-8y)
4(5x-2y)
x(20-8y)
Answer:
4(5x-2y)
Step-by-step explanation:
You can only take out the 4 because 20 and 8 are divisible by 4. You also can't take out x because it's only next to the 20 in the equation.
Round 7.3084 to 2 decimal places.
Answer:
[tex] \sf \: 7.31[/tex]
Step-by-step explanation:
Now we have to,
→ round a number to 2 decimal places.
The number is,
→ 7.3084
Let's solve the problem,
→ 7.3084
→ ≈ 7.308
→ [tex] \boxed{ \sf ≈ 7.31} [/tex]
→ ≈ 7.3
Hence, the answer is 7.31.
please help: find m∠LHF
Answer:
17
Step-by-step explanation:
5y - 8 = 9y - 28
-8 = 4y - 28
4y = 20
y = 5
9(5) - 28
45 - 28
17
The difference between the two groups compared will have more significance as the p-value becomes __________. The difference between the two groups compared will have more significance as the t-value becomes __________.
The significance of the difference between the two groups under comparison will increase as the p-value decreases. The significance of the difference between the two groups under comparison will increase as the t-value rises.
If there is a significant difference between two groups, what does that mean?A difference that is "statistically significant" does not necessarily have to be "large, important, or significant in terms of the utility of the finding"; it simply means that there is statistical evidence that there is a difference.
When the p-value exceeds the significance level, what does that mean?In general, when the null hypothesis H0 is true, our sample results could have happened by random chance alone when the p-value is "high" (i.e. greater than or equal to the significance level).
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A recipe for 2 dozen cookies requires 3 cups of flour. The number of cookies baked varies directly with the amount of flour used.
Question:
How many cups of flour are needed to make 75 cookies?
A) 600
B) 8
C) 938
D) 3618
2 dozen = 24
24 cookies = 3 cups
24 x 2 = 48
48 cookies = 6 cups
24 x 3 = 72
72 cookies = 9
9 ~ 8
~
i think the anwser is b. 8
What is the surface area of the square pyramid?
Answer:
16m^2
Step-by-step explanation:
SA = 2bs + b^2
= 2(2m)(3m) + (2m)^2
= 16m^2
solve for x
find AC
this is the last question I'm posting
Answer:
x = 15, AC = 25
Step-by-step explanation:
Given a tangent and a secant from a external point to a circle, then
The product of the external part and the whole of the secant is equal to the square of the tangent.
(9)
12(12 + x) = 18² = 324 ( divide both sides by 12 )
12 + x = 27 ( subtract 12 from both sides )
x = 15
(10)
9(9 + 3x + 1) = 15²
9(3x + 10) = 225 ( divide both sides by 9 )
3x + 10 = 25 ( subtract 10 from both sides )
3x = 15 ( divide both sides by 3 )
x = 5
Then
AC = 3x + 10 = 3(5) + 10 = 15 + 10 = 25
PLEASE HELP!!
Which parent function is represented by the table?
A. f(x) = 2x
B. f(x) = 1x1
c. f(x) = x
D. f(x) = x2
Option C is correct, the parent function represented by the table is f(x) = x.
What is a function?A relation is a function if it has only One y-value for each x-value.
Looking at the table, we can see that when x is negative, the values of y are negative and increase as x approaches zero.
When x is positive, the values of y are positive and increase as x increases.
Moreover, the values of y increase faster than x.
This behavior is typical of the parent function f(x) = x.
Hence, the parent function represented by the table is f(x) = x.
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write an equivalent expression for 3m + 9m
Answer:
3(m+3m)
Step-by-step explanation:
On Friday, Tyler came up with the expression t= -0.5(1-2h) to represent the temperature change. His math teacher came up with the expression t= 4(2h+2) - 7h - 8.5 for the same day. Are these expressions equivalent or not?
Answer:
no
Step-by-step explanation:
A square rug measures 8 feet by 8 feet. find the diagonal distance of the rug to the nearest whole number
. Marissa is painting one of her bedroom walls. She marks off of the wall. Then she divides the marked section into 3 equal parts and paints one part blue. What fraction of the whole wall is blue?
Answer: Marissa divided the marked section of the wall into 3 equal parts. If she painted one of these parts blue, then the part that she painted blue is 1 out of the 3 equal parts. So, the fraction of the wall that is blue is 1/3.
Another way of understanding this is that if the wall is divided into 3 equal parts and Marissa painted 1 part, then the fraction of the wall that is painted is 1/3.
So the fraction of the whole wall that is blue is 1/3.
Step-by-step explanation:
How to answer this question
The value of x to the nearest degree will be 112°.
What is Circle?The circle is a closed two dimensional figure , in which the set of all points is equidistance from the center.
We have to given that;
There are three angles are shown in figure.
That is,
⇒ 59°, 108°, and 81°.
Now, We know that;
Sum of all four angles is 360°.
So, We can formulate;
⇒ 59° + 108° + 81° + x = 360°
⇒ 248° + x = 360°
⇒ x = 360° - 248°
⇒ x = 112°
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Please help if the answer is right I will give brainliest. Simplify the radical
Answer:
[tex]\frac{2\sqrt{6}}{3n^{\frac{3}{2}}}[/tex]
Step-by-step explanation:
[tex]\frac{\sqrt{8}}{\sqrt{3n^3}}==\frac{\sqrt{8}}{\sqrt{3}n\sqrt{n}}=\frac{2\sqrt{2}}{\sqrt{3}n\sqrt{n}}=\frac{2\sqrt{6}}{3n^{\frac{3}{2}}}[/tex]
A tower that is 103 feet tall casts a shadow 117 feet long. Find the angle of elevation of the sun to the
nearest degree
Answer:
[tex]\theta=61.68^{\circ}[/tex]
Step-by-step explanation:
Given that,
The height of a tower, h = 103 feet
The height of its shadow, H = 117 feet
The height of tower is perpendicular and the height of shadow is hypotenuse of a right angled triangle. We can use trigonometry such that,
[tex]\sin\theta=\dfrac{h}{H}\\\\\theta=\sin^{-1}(\dfrac{103}{117})\\\\\theta=61.68^{\circ}[/tex]
So, the angle of elevation of the sun is equal to [tex]61.68^{\circ}[/tex].
√2x – 1- x = −8
How do I solve this equation?
The solution for the given equation would be [tex]x=8+\sqrt{15},\:x=8-\sqrt{15}[/tex].
What is an equation?
An equation is a statement that two expressions are equal to each other. It is a mathematical sentence that asserts the equality of two expressions. An equation can be written in the form of:
expression_1 = expression_2
The given equation is √2x – 1- x = −8.
[tex]2x=x^2-14x+49[/tex]
[tex]x=8+\sqrt{15},\:x=8-\sqrt{15}[/tex]
Hence, the solution for the given equation would be [tex]x=8+\sqrt{15},\:x=8-\sqrt{15}[/tex].
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find the measure of angle 1
?
The diameter of a circle is two times its radius. Which equation shows
another way to represent the area of a circle?
πd2
A=
2
O πd2
A=
4
Ο Α = 2πd?
O A=47d2
Answer:
[tex]A=\pi \frac{d^2}{4}[/tex]
Step-by-step explanation:
The typical equation for the area of a circle is [tex]A=\pi r^2[/tex]. Since the answer choices are in terms of d, the diameter of the circle, you will need to find r in terms of d.
To find r in terms of d, you know that the diameter of a circle is two times its radius. As an equation, this is
[tex]d=2r[/tex], or solving for r,
[tex]r = \frac{d}{2}[/tex].
Now that you have an equation for r in terms of d, you can substitute r with [tex]\frac{d}{2}[/tex] from the original equation.
[tex]A=\pi r^2[/tex]
[tex]A=\pi (\frac{d}{2})^2[/tex]
[tex]A=\pi \frac{d^2}{4}[/tex]
HELP ME WITH THIS - FIRST ONE TO ANSWER GETS MARKED BRAINLIEST
Angle A and Angle B are complementary. If Angle A measures 48°, what is the measure of Angle B?
Answer: 42
Step-by-step explanation:
Given that one standard deviation below the mean is 24 and one standard deviation above the mean is 31, what is the mean l?
A)55
B)34
C)27.5
D)28
Answer:
C. 27.5
Step-by-step explanation:
since 24 and 31 are one standard deviation below or above the mean, we could subtract the two values and divide them by two to help find the mean.
we would first subtract the two values
31-24 = 7we would then divide that number by 2 since we are finding the average between the two numbers
7/2 = 3.5using the 3.5, you add it to the lower value (24) and subtract it from the higher value (31)
24+3.5 = 27.531-3.5 = 27.5since both calculated numbers were equal, we know that we calculated the mean correctly.
For the three-part question that follows, provide your answer to each question in the given workspace. Identify each part with a coordinating response. Be sure to clearly label each part of your response as Part A, Part B, and Part C.
Use the image below for Part A, Part B, and Part C.
Two triangles: GHI and JKL
Both have one similar angle but different side lengths
Part A: Sharon says the triangles above are similar using the AA Postulate. Is she correct?
Part B: Explain the answer from Part A.
Part C: If HI=7, find KL. Show your work.
Please Help!
The triangle given is similar to using SAS. Sharon is wrong and the value of KL is 14.
What are the triangle similarity criteria?there are three types of triangle similarity criteria known. those are
AA: Two pairs of corresponding angles are equal.SSS: Three pairs of corresponding sides are proportional.SAS.: Two pairs of corresponding sides are proportional and the corresponding angles between them are equal.Given, two Triangle ΔGHI and ΔKLJ. Also, we can see in the figure That ratio of there two known sides is equal and they both have a similar angle.
the ratio of two sides of given triangles
4/8 and 5/10
hence, the ratio of both the side is equal that is 1/2
from the SAS theorem:
Two triangles are said to be comparable if their two sides are in the same ratio as the two sides of another triangle and their two sides' angles inscribed in both triangles are equal.
thus, given triangles are similar.
Since the Ratio of all three sides would be equal.
hence, HI / KL = 1/2
the third side of the triangle JKL, KL is 14.
Therefore, The given triangle is comparable to using SAS. Sharon is mistaken; The value of KL is 14.
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The box plot below describes a data set. Which of the following has a value of 18?
Answer:
the answer is third quartille
Step-by-step explanation
Help Plz :)
Hehehehehehehee
Answer:
Step-by-step explanation:
.
.
solve: Tan20. Tan 40. Tan 80
plaease help me.....
Answer: you need more information to solve
Step-by-step explanation:
mZAOB = 6x- 12°
mZBOC = 3x+ 30°
Find mZAOB:
Answer:
6x+3x×12-30
9x×do 30-12
then multiple it and there is the ans
HELP PLEASE!!!
The circumference of a circular field is 276 yards. What is the diameter of the field?
Round your answer to the nearest hundredth.
Determine whether each number is prime or composite.
1. 41
2. 29
3. 87
4. 36
5. 57
6. 61
7. 71
8. 103
9. 39
10. 91
11. 47
12. 67
please!!!!Can somebody help me
1.)41 is prime
2.29 is prime
3.87 is composite
4.36 is composite
5.57 is composite
6.61 is prime
7.71 is prime
8.103 is prime
9.39 is composite
10. 91 is composite
Q1) A car travels 145 miles in
3 hours and 38 minutes. How
fast did it travel?
38 minutes / 60 minutes = 0.63
The car traveled for 3.63 hours
Speed = distance/ time
Speed = 145 / 3.63 = 39.94 miles per hour
Round the answer as needed.
What should be added to the product of X and 2 to get x * 1 point?
To get x * 1 point, the product of X and 2 should have x added to it.
let us assume unknown value = y
2x+y=x
y=x-2x
y=-x
so if we add "-x" in the product of x and 2 we get x
Algebraic expressions are the idea of expressing numbers using letters or alphabets without specifying their actual values. The basics of algebra taught us how to express an unknown value using letters such as x, y, z, etc. These letters are called here as variables. An algebraic expression can be a combination of both variables and constants. Any value that is placed before and multiplied by a variable is a coefficient.
These expressions are represented with the help of unknown variables, constants and coefficients. The combination of these three (as terms) is said to be an expression. It is to be noted that, unlike the algebraic equation, an algebraic expression has no sides or equal to sign.
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