Question

Does anyone know how to do any of these problems? My notes are no help and none of my classmates know what to do either.

Answer 1

17) 40°

18) 3x+22

19) (1,-4.5)

20) (-1,-2.5)

Explanation:

17) 99=59=40°

18) 2x+7+x+15=3x+22

19) 6-(-8)=14

14/2=7

-8+7=1

-2-(-7)=5

5/2=2.5

-2-2.5=-4.5

midpoint = (1,-4.5)

20) 6-(-8)=14

14/2=7

-8+7=-1

5-(-10)=15

15/2=7.5

-10+7.5=-2.5

Midpoint = (-1,-2.5)