Greatest common factor(GCF) of 90 & 45

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

Aball is thrown from a height of 139 feet with an initial downward velocity of 15 ft/s. the ball's height h (in feet) after t seconds is given by the following. h=139-15t-16t^2 how long after the ball is thrown does it hit the ground? round your answer(s) to the nearest hundredth. (if there is more than one answer, use the "or" button.) t =

Solve the equation: x - 9 = -6 + 5 a. 21 b. 7 c. 14 d. 2