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Choose an efficient linear-combination strategy
Grade Level
SAT Prep
M077 Choose an efficient linear-combination strategy
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Consider the system Equation 1: -3x - 40y = 9; Equation 2: 56y - 4x = -4. Which strategy uses the coefficients efficiently to eliminate y?
A
Add the equations as written.
B
Multiply equation 1 by 7 and multiply equation 2 by 5; then subtract equation 2 from equation 1.
C
Multiply equation 1 by 7 and multiply equation 2 by 5; then add.
D
Subtract equation 2 from equation 1 as written.
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