Which of these strategies would eliminate a variable in the system of equations? \begin{cases} 8x + 5y = -7 -7x + 6y = -4 \end{cases} ⎩ ⎪ ⎪ ⎨ ⎪ ⎪ ⎧ 8x+5y=−7 −7x+6y=−4 choose all answers that apply: choose all answers that apply:

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