Question

Solve the following system of equations using elimination:
3x + 5y = 4
4x + 2y = -18


A. (-12, 8)
B. (-7, 5)
C. (-4, -1)
D. (-2, 2)

Answer 1

so is it A?

Answer 2

hold on i gave you the wrong instructions, let me do it for you

Answer 3

ok

Answer 4

its b

Answer 5

you were supposed to multiply the first one by -4 and the second one by 3 so your x's would be -12 and 12, so they'd cancel out. y would = 5, then if you plugged it in as 3x + 5(5) = 4, you'd solve and get x= -7

Answer 6

3x + 5y = 4 -->(-2)
4x + 2y = -18 -->(5)
--------------------
-6x - 10y =-8 (result of multiplying by -2)
20x + 10y = - 90 (result of multiplying by 5)
---------------------add
14x = -98
x = -7

3x + 5y = 4
3(-7) + 5y = 4
-21 + 5y = 4
5y = 4 + 21
5y = 25
y = 5

wowisuckatschool is correct...it is b

Answer 7

Thanks you guys!