Try using socratic that will help too
This is a proportion problem
Info needed: there is 36 inches in a yard
1/36= x/18
Cross multiply and divide
18 x 1= 18
18 divided by 36= .5 or 1/2
Answer is 1/2
You could have also known that 18 inches was half of 36 inches. Which 36 inches equals one yard
Answer:
Second box for Justifications: Subtraction Property of equality
Third box for steps: 
Fourth box for steps: 
Fourth box for Justifications: Multiplication Property of equality
Fifth box for steps: 
Answer:
The 72 feet is measured on the slope, not out from the pole horizontally. I get
top of pole is at
40 + 72 sin17°
downhill point is
72 cos 17°
from point beneath the pole
cable^2 = (40+72 sin17°)^2 + (72 cos 17°)^2
