A rectangular turf of size 20 feet by 30 feet is surrounded by a flower bed of uniform width all around. The total area of the turf and the flower bed is 1200 sq. ft. What is the width of the

flower bed? Show your work algebraically.(4 points)

2) You are running a concession stand at a basketball game. You are selling hot dogs and

You drop a rubber ball off the roof of a 50 meter high building onto a paved parking lot. it bounces back up with every bounce, but not quite all the way back up to you. after the first bounce it bounces back only 80 percent of the distance it was dropped from. the pattern continues, meaning after every bounce it comes up to just 80 percent of the previous maximum height. so if before the first bounce the height is 50 meters, what height does the ball reach after the fifth bounce? round your answer to one decimal place and chose the correct response from the choices below:

The base of a triangle exceeds the height by 9 inches. if the area is 180 square inches, find the length of the base and the height of the triangle.

Which expression demonstrates the use of the commutative property of addition in the first step of simplifying the expression (-1+i)+(21+5i)+0