I need help this is for finals

When a rectangle is dilated, how do the perimeter and area of the rectangle change?

Cody started biking to the park traveling 15 mph, after some time the bike got a flat so cody walked the rest of the way, traveling 4 mph. if the total trip to the park took 6 hours and it was 46 miles away, how long did cody travel at each speed? solve using rate times time= distance

Solve each quadratic equation by factoring and using the zero product property. x^2 - 8x + 30 = 3x