Question

Which equation is part of solving the system by substitution?

StartLayout Enlarged left-brace 1st Row x + y = 11 2nd row 4 x squared minus 3 y squared = 8 EndLayout
4(y + 11)2 – 3y2 = 8
4(11 – y)2 – 3y2 = 8
4(y – 11)2 – 3y2 = 8
4(–11y)2 – 3y2 = 8

Answer 1

x = 11 − y, so substitute into 4x^2 − 3y^2 = 8 to get
4(11 − y)^2 − 3y^2 = 8.

Thus the correct choice is: 4(11 − y)^2 − 3y^2 = 8.