Alittle ? i've been using a calculator since i'm in 7th grade, but part of the air (state test) for 7th graders is without a calculator. can someone re-teach me how to do this problem without a calculator?

1.36 divided by 0.08

The answer is 17. I will put the other side in a comment. It took me forever to do this, so someone else has probably answered already.

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.

step-by-step explanation:

6