What is the inverse of f(x) = (5x+2)^2 for x > -2/5

The longer leg of a 30-60-90 trangle is 18

If a distance of 75 yds is measured back from the edge of the canyon and two angles are measured , find the distance across the canyon angle acb = 50° angle abc=100° a=75 yds what does c equal?

Which angle has the same measure as the dehedral angle formed by the orange face and the purple rectangle