In order to solve the following system of equations by addition, which of the following could you do before adding the equations so that one variable will
be eliminated when you add them?
21 – 4y= 5
61 – 31= 10
O A. Multiply the top equation by 3 and the bottom equation by 4.
O B. Multiply the top equation by -3.
C. Multiply the top equation by -2.
D. Multiply the top equation by -3 and the bottom equation by 2.

the one that has a slope of 1/2 and is positive.

step-by-step explanation: 2 buckets 1 trip ; 4 buckets 2 trips and so on.

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step-by-step explanation:

step-by-step explanation:

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answer: they are supplementary angles

step-by-step explanation: 161+19=180. supplementary angles equal 180 degrees