Answer:
vertical angle relationships are formed.
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1. She could get 9 envelopes for 4 dollars each (or the other way around)
2. She could get 12 envelopes for 3 dollars each (or the other way around)
3. She could get 18 envelopes for 2 dollars each (or the other way around)
Step-by-step explanation:
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Help my teacher needs it it was due on Tuesday
Answer:
y = -8
Step-by-step explanation:
Solve as a system of equations
2x + y = -8 multiply this equation by 2
-4x + 2y = -16 Do not change
Solving: 4x + 2y = -16
<u> -4x +2y = -16 </u>
4y = -32
y = -8
2x + y = -8 Solve for x
2x = -y - 8
x = -y/2 - 8/2
x = -1/2y - 4 Substitute this into your second equation
-4x + 2y = -16
-4(-1/2y - 4) + 2y = -16
2y -16 +2y = -16
4y - 16 = -16
4y = -32
y = -8 x = -1/2(-8) -4 = 4 - 4 = 0
Checking the answer
2(0) + -8 = -8
-4(0) +2(-8) = -1 6 = 0 -16 = -16