3x + 11y = 4
2x + 6y = 0
I got
15/2, -5/4
Answer:
Step-by-step explanation:
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The answer would be 270 cookies would be needed to serve 90 students
If it takes the cold water faucet x minutes to fill 1 tub, then its flow rate is (1 tub)/(x min).
The hot water faucet takes 4 times as long, so its flow rate is (1 tub)/(4x min).
Together, the total flow rate is (1 tub)/(3 min), so we have



