If y varies directly as x and y is 6 when x is 72 what is the value of y when x is 8

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?

Simplify this expression.2(10) + 2(x – 4) a. 2x + 16 b. x + 12 c. 2x + 12 d. x + 16

11. a particular type of cell doubles in number every hour. which function can be used to find the number of cells present at the end of h hours if there are initially 4 of these cells? a. n = 4 ()" b. n = 4(2)" c. n = 4 + (2)" din = 4 +"