Which of these strategies would eliminate a variable in the system of equations?
8x + 5y = -7
-7+ 6y = -4

choose all answers that apply:

a. multiply the top equation by 6, multiply the bottom equation by -5, then add the equations.

b. multiply the top equation by 7. then add the equations.

c. multiply the bottom equation by 8, then add the equations.

A.

Step-by-step explanation:

multiply the to equation by 6, multiply the bottom equation by -5 (you will get +30y and -30y to eliminate each other)then add equations (you will have +48x and +45x which will be = -42 + 20)

hello from mrbilldoesmath!

answer:

the domain is the set { -2, 0, 2, 3}

discussion:

the domain is the set of x values in the ordered pairs (x,y). taking the x, or first component, of each ordered pair gives   -2, 0, 2, 3.

you,

mrb