Which of the following are true statements about the expression 512?
Check all that apply.
A. 12 is the base.
O
B. 5 is the base.
c. 12 is the exponent and tells us how many times we should
multiply 5 by itself.
D. 5 is the exponent and tells us how many times we should multiply
12 by itself.

center= (-2,0)

radius= sqrt2/2

step-by-step explanation:

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 ≈ 172.05

step-by-step explanation:

the pictures.