If n is divided by 7, the remainder is 5. which of the following could not be the value of 2n?
a. 24
b. 52
c. 66
d. 86
e. 108

The length of a rectangle is x times the square root of 100. the width is one-half y more than three-halves x. given that the area of the rectangle is 125 cm2, which equation could represent the rectangle in terms of x and y? a) 5xy − 15x = 125 b) 5xy + 15x = 125 c) 15x2 − 5xy = 125 d) 15x2 + 5xy = 125

Solve 3x-18=2y and 5x-6y=14 by elimination or substitution . show all !

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).