Find the value of the variable.

Hey there!

Your answer is x = 275.

First let's simplify the right side of the equation. I'm just going to put it into a calculator because it will get messy with decimals. But know that the operations inside parenthesis are done before squaring the value.

15 is square rooted (is that a word?), multiplied by 5, and after that it is squared. This is equal to 375.

Now we have the following:

Divide each side of the equation by .

x = 275

The value of x is 275.

Hope this helps!

Heya!

I'm going to skip the decimal part with the square root since its a non-terminating decimal.

Steps to solve:

~Simplify

~Multiply to both sides

~Simplify

→ ←

Best of Luck!

second option

step-by-step explanation:

the measures of a triangle equal 180. use that to find x.

2x+3x+4x=180

9x=180

9x/9=180/9

x=20

now you know x, you know angle a is 40°, angle b is 60°, angle c is 80°.

because angle a is 40°, the first option doesn't work.

because angle b is 60°, the second option does work.

when you add angle a and b, you get 100°. complementary means it equals 90°, so the third option doesn't work.

when you add angle a and c, you get 120°, which is not 100.

a

step-by-step explanation: