alex has a 48 mile trail first half of the time he was biking twice as fast as the second half of the time if he spent 4 hours on the road how fast was he biking at first

A)a square brown tarp has a square green patch green in the corner the side length of the tarp is (x + 8) and the side length of the patch is x what is the area of the brown part of the tarpb)a square red placemat has a gold square in the corner the side length of the gold square is (x - 2) inches with the width of the red region is 4 in what is the area of the red part of the placemat