If the point (a,7) lies on the graph of the equation 5x-y=8, then a= a) -3 b) 3 c) 1/5

Tom drove 206 miles in 3.9 hours. estimate his average speed.

Kristen is wrapping presents for the holidays. she has a box that measures 4 ft. x 2 ft. x 2 ft. how many square feet of wrapping paper does she need to cover the box without overlapping?

What is the area of a rectangle with vertices (-8,-2), (-3,-2), (-3,-6), and (-8,-6)? units