Find the solutions to the equation below. check all that apply. x^2-9=0

Step-by-step explanation:

Alright, lets get started.

The given equation is :

We need to add 9 in both sides of equation.

Taking square root on both sides

So there will be two values of x

And

Hence the answer is 3 and -3   :    Answer

Hope it will help :)

i believe the answer is 68cm

step-by-step explanation:

i just took 34 x 2 because the space between v and y is the same as y to k.

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.