3 years ago

What is the value of X?

Mathematics

1 answer:

zmey [24]3 years ago

5 0

Answer:50°

Step-by-step explanation:

2(x+10)=3x-30

2x+20=3x-30

50°=x

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A regular octagon rotates 360° about its center. How many times does the image of the octagon coincide with the preimage during

True [87]

Hello there!

The correct answer is D. 8.

Hope This Helps You!
Good Luck :)

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3 years ago

9a + 18c. What is the value of the expression when a = −5 and c = −1?

saw5 [17]

1. plug in the numbers for the variables, like this: 9(-5)+18(-1)

2. solve
Hopefully this helps! Let me know if you need more explanation.

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2 years ago

Find the distance between each pair of points. Round your answer to the nearest tenth, if necessary. Hint: Use the Pythagorean T

Paul [167]

The distance between two points on the plane is given by the formula below

$\begin{gathered} A=(x_1,y_1),B=(x_2,y_2) \\ \Rightarrow d(A,B)=\sqrt[]{(x_1-x_2)^2+(y_1-y_2)^2} \end{gathered}$

Therefore, in our case,

$A=(-1,-3),B=(5,2)$

Thus,

$\begin{gathered} \Rightarrow d(A,B)=\sqrt[]{(-1-5)^2+(-3-2)^2}=\sqrt[]{6^2+5^2}=\sqrt[]{36+25}=\sqrt[]{61} \\ \Rightarrow d(A,B)=\sqrt[]{61} \end{gathered}$

Therefore, the answer is sqrt(61)

In general,

$-(-n)=n$

Remember that

$-n=(-1)\cdot n$

Therefore,

$\begin{gathered} a-(-n)=a+(-1)(-n)=a+(-1)(-1\cdot n)=a+(-1)^2\cdot n=a+1\cdot n=a+n \\ \Rightarrow a-(-n)=a+n \end{gathered}$

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1 year ago

Fred and Victoria provide the following proofs for vertical angles to be equal:

mart [117]

Answer should be <span>Both Fred's and Victoria's proofs are correct.</span>

8 0

3 years ago

Read 2 more answers

I’ll give points and brainalist for a correct answer / explanation

wlad13 [49]

Answer:

Answer is C

r= 3

there are 4 circles.

total area of circle = 4 π 3²

so shaded area = 12²- 4π3²= 30.90

Step-by-step explanation:

3 0

3 years ago