Question

Solve by the linear combination method (with or without multiplication).


x + y = 50
0.05x + 0.06y = 2.8










A.

(40, 60)








B.

(20, 30)








C.

(20, –50)








D.

(10, 30)

Answer 1

@DSS I finally get the concept but now I just need someone who knows it better to double check because I can only get 2 wrong

Answer 2

ok

Answer 3

thx again

Answer 4

x + y = 50 I'd solve for x and use substitution. y = 50-x
0.05x + 0.06y = 2.8

0.05x +0.06(50-x)=2.8
x = 20
y = 30

Answer 5

thx :D