Josh needs to solve the system of equations below.
4z + 5y = 7
2z - 3y = 9
...
Mathematics, 27.01.2021 19:50 maribelsalgado3
Josh needs to solve the system of equations below.
4z + 5y = 7
2z - 3y = 9
He decides to use the elimination method to cancel out the z terms in order to first solve for y. Josh uses the following steps:
Step 1: 4z + 5y = 7
-2(2z) - 3y = 9
Step 2: 4z + 5y = 7
-4z - 3y = 9
Step 3: 2y = 16
Step 4: y = 8
Did Josh use the correct steps to solve for y?
A
No, Josh should have multiplied the entire second equation by -2.
B
No, Josh should have multiplied the entire second equation by -4.
C
Yes, Josh correctly solved for y.
D
No, Josh should have multiplied 2z by 2 instead of by -2.
Answers: 1
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