A golf course has a circular island of grass with a diameter of 15 yards. The mowing company charges $6.50 per square yard. How much will the golf course have to pay to maintain the grass on the circular island?

According to statistics a person will devote 32 years to sleeping and watching tv. the number of years sleeping will exceed the number of years watching tv by 18. over a lifetime, how many years will the person spend on each of these activities

Identify the expression equivalent to 4(x + x + 7) − 2x + 8 − 4 by substituting x = 1 and x = 2.

Assume that y varies inversely with x. if y=1.6 when x=0.5 find x when y=3.2