simplify the expression.

3/[tex]\sqrt{7}-\sqrt{2}[/tex]

Simplify The Expression.3/[tex]\sqrt{7}-\sqrt{2}[/tex]

Answers

Answer 1

[tex]\dfrac{3}{\sqrt 7- \sqrt 2}\\\\\\=\dfrac{3 \left( \sqrt 7+ \sqrt 2\right)}{\left(\sqrt 7- \sqrt 2 \right)\left( \sqrt 7+\sqrt 2\right)}\\\\\\=\dfrac{3 \left( \sqrt 7+ \sqrt 2\right)}{\left(\sqrt 7 \right)^2 - \left(\sqrt 2 \right)^2 }\\\\\\= \dfrac{3 \left( \sqrt 7+ \sqrt 2\right)}{7-2}\\\\\\=\dfrac{3 \left( \sqrt 7+ \sqrt 2\right)}5[/tex]


Related Questions

I need help with this problem please

Answers

using pythagoras theorem, 12 (a) squared is 144 and 7(b) square is 49, 144 + 49= 193
square root of 193 is 13.892

Simplify. Write the answer with positive exponents only.
x3 x5
x3 x5 =

Answers

Answer:

1/x^2

Step-by-step explanation:

Reformatting the input :

Changes made to your input should not affect the solution:

(1): "x5"   was replaced by   "x^5".  1 more similar replacement(s).

Step 1:

Simplify x^3 / x^5

Dividing exponential expressions :

x^3 divided by x^5 = x ^ (3-5) = x^(-2) = 1/x^2

Need to find best answer

Answers

Answer:

Step-by-step explanation:

The question is 10b/(2b + 8)

The reciprocal will not make a minus sign. B and C are both wrong. Powers can create a minus sign but not this kind of question

Two terms creating a binomial must stay together. In this case (2b + 8) must be entirely in the top or bottom of the fraction. That makes  D wrong.

Answer: A is the correct reciprocal.

a group of 10 people are ordering pizza. each person wants 2 slices and each pizza has 5 slices. how many pizzas should thay order

Answers

Answer:4

Step-by-step explanation:

2 slices each ten people times them together 20 slices .4 pizzas*5slices=20

Russ and Vickie are trying to solve this problem: There are 130 students taking buses to the museum. If each bus holds 22 students, how many buses will they need? Vickie says the students need 5 buses. Russ says they need 6 buses. Who is correct? They will need ? buses. So, ? is right.

Help meeee!!!!

Answers

Answer:

Russ is correct

Step-by-step explanation:

Russ is correct because 130/22 will not be quite to 6, but you can't have 9/10 of a bus so you will round up to 6.

Gus bought 12 gallons of gas at $2.17
a gallon, a bottle of oil for $2.49 and
two jugs of anti-freeze for $7.98 each.
He paid $1.52 in tax for the oil and
anti-freeze. If he paid with a $50 bill,
how much change did he receive?

bro help lol

Answers

Answer:

$3.99

Step-by-step explanation:

a gallon of gas=2.17$

12 gallons of gas=2.17$×12 =26.04$

2 jugs of anti freeze =7.98$ × 2 = 15.96$

a bottle of oil = 2.49$

tax= 1.52$

total= 46.01$

he paid 50$

so the change could be 50$-46.01$ = 3.99$

the answer is 3.99$

simplify a^9xa^4
how i do this

Answers

Answer:

a13

Step-by-step explanation:

a^9 × a^4 = a(9 + 4)

= a13

I NEED HELP!! PLEASE HELP!! Find the area of the shaded region. Round your answer to the nearest hundredth.
area: about __ft2

Answers

The area of the shaded region in the given quadrant, to the nearest hundredth is: 4.57 ft².

What is the Area of a Quadrant?

Area of a quadrant = 1/4 × area of a circle = 1/4 × πr²

The figure has been partitioned into A, B, C to E.

The area of the shaded region = A + B

Step 1: Find the area of A:

Area of A = area of the square formed by D, A, and C - area of D + area of C.

Area of D = area of square - area of quadrant formed by A and C

Area of D = s² - 1/4 × πr² = 2² - 1/4 × π(2)²

Area of D = 0.86 ft²

Area D = area of C = 0.86 ft²

Area of D + area of C = 2(0.86) = 1.72 ft²

Area of A = 4 - 1.72 = 2.28 ft²

Step 2: Find the area of quadrants E and F

Area of quadrants E and F = 2(1/4 × πr²) = 2(1/4 × (3.14)(2)²)

Area of quadrants E and F = 6.28 ft².

Step 3: Find the area of B

Area of B = area of the biggest quadrant - area of quadrants E and F + area of square formed by D, A, and C

Area of B = 1/4 × πr² - 6.28 + 4

Area of B = 1/4 × π(4²) - 10.28

Area of B = 2.29 ft².

Step 4: Find the area of the shaded region

Area of the shaded region = A + B = 2.28 + 2.29

Area of the shaded region = 4.57 ft².

In conclusion, the area of the shaded region in the given quadrant, to the nearest hundredth is: 4.57 ft².

Learn more about area of quadrant on:

https://brainly.com/question/11066058

or 22,4:58:53 AM
Watch help video
Cooper gave out a survey to some students in his school about their favorite color.
tudents could choose between red and blue. 129 of those surveyed said their favorite
color was red. 57% of the students surveyed said their favorite color was blue. How
many students were surveyed in total?

Answers

Answer:

300 students were surveyed.

Step-by-step explanation:

Well, we know that 57% of students like blue, so that leaves 43% who like red. By simply dividing 129 by 43, we get 3, so know we can conclude that 1% is equal to 3 students. Knowing this, we can multiply 3 by 57 to get 171. Adding these up, we get 300, and we can verify this, by simply finding the difference between 57 and 43, which is 14. Now that we also know that 1% is equal to 3 students, we can multiply 14 by 3, to get 42, which is also the difference between 171 and 129.

What is the value of k? G(x)=f(x+k)

Answers

Answer:

K=6

Step-by-step explanation:

I hope this answer is right

Solve this system of linear equations. Separate
the x- and y-values with a comma.
18x - 7y = -17
3x - 3y = -12
Enter the correct answer.

Answers

Answer:

-> (x,y) => (1,5)

x = 1y = 5

Step-by-step explanation:

Let's solve your system by elimination.

18x−7y=−17;3x−3y=−12

Multiply the second equation by -6, then add the equations together.

(18x−7y=−17)

−6(3x−3y=−12)

Becomes:

18x−7y=−17

−18x+18y=72

Add these equations to eliminate x:

11y=55

Then solve 11y=55for y:

11y=55

11y/11 = 55/11

(Divide both sides by 11)

y=5

Now that we've found y let's plug it back in to solve for x.

Write down an original equation:

18x−7y=−17

Substitute5foryin18x−7y=−17:

18x−(7)(5)=−17

18x−35=−17(Simplify both sides of the equation)

18x−35+35=−17+35(Add 35 to both sides)

18x=18

18x/18 = 18/18

(Divide both sides by 18)

x=1

A total of 133 million square miles of the Earth's surface are covered in water. The ratio of the area covered in water to the area of land is 7/3. Find the area of land on Earth.
URGENT! Whoever gets first correct answer is brainliest

Answers

Answer:

57 million square miles

Step-by-step explanation:

Let the area of water is w and area of land is l.

Their ratio is:

w/l = 7/3

or

133 / l = 7/3

Find the value of l

l = 133*3/7l = 57 million square miles

Let that be x

133/x=7/37x=399x=399/7x=57M mi²

A triangle has one angle that measures 56° and one angle that measures 63º.
The measure of the triangle's third angle is degrees.
The solution is

Answers

sum of a triangle= 180°63+56=119180-119=61ans=61°

18-3b for b=4


please help ​

Answers

Answer:

im sorry I don't know I didn't do stuff like this in school

What is the multiplicity of (-4,0)?

Answers

Answer:

A "zero" of a polynomial is a value of x at which the polynomial, when evaluated, is equal to zero. Since (−x)4=(−1)4x4=x4 ( − x ) 4 = ( − 1 ) 4 x 4 = x 4 , the zero 0 has multiplicity 4 .

...

More help if you can! I desperately need to pass this one class

Answers

Answer:

volume of cuboid = lbh = 8.2 ft x 9.4 ft x 10.7 ft

= 824.8 ft^3


[tex]t ^{3} = \frac{64}{27} [/tex]
If t to the power of 3 = 64/27, what is the value of t? Give your answer as a fraction. Enter your answer in the boxes.​

Answers

[tex] {t}^{3} = \frac{64}{27} \\ [/tex]

[tex]t = \sqrt[3]{ \frac{64}{27} } \\ [/tex]

[tex]t = \frac{ \sqrt[3]{64} }{ \sqrt[3]{27} } \\ [/tex]

[tex]t = \frac{4}{3} \\ [/tex]

give the missing angle​

Answers

Answer:

60°, 115°, 65°

Step-by-step explanation:

Angles a and 60°, also c and 65° are alternate interior angles and therefore are equal:

a = 60°c = 65°

Angles b and 65° form a linear pair, so they sum to 180°

b + 65° = 180°b = 180° - 65°b = 115°

Answer:

a = 60°

b = 115°

c = 65°

Step-by-step explanation:

Alternate Interior Angles Theorem

If a line intersects a set of parallel lines in the same plane at two distinct points, the alternate interior angles that are formed are congruent (same).

Therefore, a = 60° and c = 65°

Angles on a straight line sum to 180°

⇒ b + 65° = 180°

Subtracting 65° from both sides:

⇒ b + 65° - 65° = 180° - 65°

⇒ b = 115°

which number has 5 that is 1/10 the value of the 5 in 522.12?

Answers

Answer:

50,12

Step-by-step explanation:

any number that has 5 in the tensplace is correct

1/10 of 100 is 10

An equation is shown below:

5(2x − 3) = 5

Part A: How many solutions does this equation have? (4 points)

Part B: What are the solutions to this equation? Show your work. (6 points)

Your answer:

Answers

Answer:

this equation has 1 answer

Step-by-step explanation:

x = 2

Identify the equation for the parabola with the focus F(0,-9.5) and directrix y =9.5

Answers

Considering the given focus and directrix, the equation of the parabola is given by:

[tex]y = -2.375x^2[/tex]

What is the equation of a parabola?

The equation of a parabola, with a directrix in y, is:

[tex]y - k = a(x - h)^2[/tex]

In which:

The value of a is of 0.25C.The vertex is (h,k).The focus if (h, k+C).The directrix if y = k - C.

In this problem, we have that the x-coordinate of the vertex is h = 0.

From the focus and the directrix, we have that:

k+C = -9.5

k - c = 9.5.

Hence k = 0, C = -9.5 = a = 0.25C = -2.375.

Thus the equation of the parabola is given by:

[tex]y = -2.375x^2[/tex]

More can be learned about the equation of a parabola at https://brainly.com/question/26144898

can i have some super quick help? subject is stretching and reflecting quadratic functions

Answers

#1

Passes through

(-1,4)

y=x² passes through (-1,1)

Stepped 4 times

y=4x²

#2

First make a negative as parabola is opening downwards.

y=-x²

Passes through (1,-2)

y=-x² passes through (1,-1)

So

final graph

y=-2x²

Answer:

a)  Stretched parallel to the y-axis by a scale factor of 5

b)  Stretched parallel to the y-axis by a scale factor of 5/2 and reflected in the x-axis.

Step-by-step explanation:

Transformation

y = a f(x)

The graph of a f(x) is f(x) stretched parallel to the y-axis (vertically) by a factor of a.If a < 0, the graph is also reflected in the x-axis

Part (a)

[tex]\textsf{Parent function}:\quad y=x^2[/tex]

[tex]\textsf{Transformed function}:\quad y=5x^2[/tex]

Transformation:  Stretched parallel to the y-axis by a scale factor of 5.

Part (b)

[tex]\textsf{Parent function}:\quad y=x^2[/tex]

[tex]\textsf{Transformed function}:\quad y=-\dfrac{5}{2}x^2[/tex]

Stretched parallel to the y-axis by a scale factor of 5/2 and reflected in the x-axis.

Next question
In an isosceles triangle, one angle is 81° greater than each of the other two equal angles. Find the measure of all three angles.
The two smaller angles are each
The larger angle is °.

Answers

Ans is 27


Explanation:
Isosceles is 2 r the same which means that 81 and 81 minus 180

The measure of all three angles is 81, 49.5 and 49.5 degrees.

What is Angle sum property?

According to the angle sum property of a triangle, the sum of all three interior angles of a triangle is 180 degrees. A triangle is a closed figure formed by three line segments, consisting of interior as well as exterior angles.

The angle sum property formula for any polygon is expressed as, S = (n − 2) × 180°, where 'n' represents the number of sides in the polygon. This property of a polygon states that the sum of the interior angles in a polygon can be found with the help of the number of triangles that can be formed inside it.

Given:

The triangle is isosceles which has two sides equal.

Also Two angles equals.

Let the equal angles are x.

third angle= 81 degree

Now, Using Angle Sum property

x+ +x + 81 = 180

2x= 180-81

2x= 99

x= 99/2

x= 49.5 degrees

Hence, the two smaller angles are 49.5 degrees.

Learn more about Angle sum property here:

https://brainly.com/question/21099419

#SPJ2

Find the missing measurement
A= 5
B=
C =11 ​

Answers

Step-by-step explanation:

a^2 + b^2 = c^2

5^2 + b^2 =11^2

25 + b^2 = 121

b^2 = 121 - 25

b^2 = 96

b =9.8

I don't know if this what you need but I hope this helps

need this answer ASAP 20 points as reward

Answers

1- 1600 cm^3
2- 6
see below for methods

Pls help me
Pls show your answer pls and thank you

Answers

Answer:

DWest I think

Step-by-step explanation:

I dont really know if this is right so pls forgive me if this is wrong.

20 characters or more

Answers

Answer:

2 (y-value increase as x-value also increase)

Step-by-step explanation:

Lets look at the graph! when x is 7, y is 4. and when x is 9, y is 5 which is proving that they BOTH increase

It’s C if I’m not mistaking multiply or divided

I WILL GIVE YOU 20 POINTS TO THOSE WHO ANSWER THIS QUESTION RIGHT NOOOO SCAMS AND EXPLAIN WHY THAT IS THE ANSWER

Answers

Answer:

91⁰

Step-by-step explanation:

By using exterior angle theorm,

3=44+47=91⁰

solve x/9 + 1/3 = -4/3
The solution is x = ?

Answers

Answer:

x = - 15

Step-by-step explanation:

[tex]\frac{x}{9}[/tex] + [tex]\frac{1}{3}[/tex] = - [tex]\frac{4}{3}[/tex] ( multiply through by 9 to clear the fractions )

x + 3 = - 12 ( subtract 3 from both sides )

x = - 15

Answer:

Solve for x by simplifying both sides of the equation, then isolating the variable.

x=−15

Find the slope and the equation for the line passing through the points: (-3,0) and (-1,2)

Answers

Answer:

slope: 1equation: y = x +3

Step-by-step explanation:

The slope of the line between two points can be found using the slope formula:

  m = (y2 -y1)/(x2 -x1)

  m = (2 -0)/(-1 -(-3)) = 2/2

  m = 1 . . . . . the slope of the line is 1

__

The value of the y-intercept can be found by solving the slope-intercept equation for b.

  y = mx +b

  b = y -mx

  b = (0) -(1)(-3) = 3 . . . . . using point (x, y) = (-3, 0)

The equation of the line with slope 1 and y-intercept 3 can be written as ...

  y = x +3

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