1. REVIEW: Simplify the expressions below using the rules of exponents. a. 4*3
b. 2°
C. 3*7 • 5*-5
d. (2*2)4

answer is:

1.75 pounds

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.

the olimpics is not going to wokk out

step-by-step explanation: