Sin (A) = BC/AB = 21/75= 7/25
√(x-5) = √(3-x)
|x-5| = |3-x|
x-5= 3-x
2x = 8
x=4
From the given figure

Since XY = 5.1 and XZ = 7.7, then

To find x, use the inverse of cos

Use the calculator to find x

The answer is
150 miles at a rate of 60 miles per hour. 150/60=2.5 hours
He figures that it will take 25 hours. Wrong
B) At a restaurant, William and eight friends divided the bill evenly. If each person paid $10.20, what was the total bill?