Solve by the linear combination method (with or without multiplication). 2x + 3y = 11 –4x + 2y = 2 A. (1, 3) B. (2, 3) C. (1, 2) D. (1, –2)
I think it is A, Right?
2x + 3y = 11 2( 2x + 3y = 11) 4x + 6y = 22 –4x + 2y = 2 -4x + 2y = 2 8y = 24 y = 3
yes
ok thank you can you answer another one for me?
sure
Solve by the linear combination method (with or without multiplication). x + y = 40 0.08x + 0.03y = 1.7 A. (40, 60) B. (20, 20) C. (10, 30) D. (20, –50)
What do you think it is?
B.
y = 40-x 0.08x + 0.03 (40-x) = 1.7 solve this...it's not B
C.
I got C.
0.08x + 1.2 - 0.3x = 1.7 0.05x = 1.5 x = 10 yes...C
ok one more...please?
ok
Solve by the linear combination method (with or without multiplication). 3x – 4y = 37 5x + 2y = 1 A. (9, 4) B. (3, 7) C. (–3, –7) D. (3, –7)
Show me what you're trying
I got D.
Me, too. Good
thanks again!
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