A new sidewalk will be 6 feet wide, 140 feet long, and filled to a depth of 3 inches (0.25 feet) with concrete. How many cubic yards of concrete are needed

Solve the system of equations. y= 2x y= x^2 - 15

For which of the following counts would a binomial probability model not be reasonable? a)the number of people in a classroom born in januaryb) the number of people in a classroom with red hair c) the number of people admitted to a hospital in a day with a particular disease d) the number of heart beats in a one-minute perio.

Solve 2x+y=3 x+y=5 in substitution method