Which expression can be used to represent the phrase “four less than seven”? A. 4-7
B. 7 + 4
C. 7-4
D. 7 x 4

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

Evaluate the expression for the given value of the variable 2×(c2-5) for c=4

The clayton family’s pool has vertices at the coordinates (0, 2), (0, 5), (2, 5), (2, 6), (5, 6), (5, 1), (2, 1), and (2, 2). if each grid square has an area of 9 square feet, what is the area of the pool?