certifiedtino4576
05.09.2020 •
Mathematics
) It takes Mike 35 minutes to inflate twenty
balloons. Mofor can inflate the same
twenty balloons in 30 minutes. If they
worked together how long would it take
them?
About 15 minutes
About 18 minutes
About 17 minutes
About 16 minutes
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Ответ:
About 16
Step-by-step explanation:
In one minute, Mike will inflate one thirty-fifth of the balloon. In one minute, Mofor will inflate one thirtieth of the balloon.
1/35 = 6/210
1/30 = 7/210
7/210 + 6/210 = 13/210
210/13 = roughly 16
About 16
Ответ:
f(3) = -(3)^2 - 9(3) - 7
f(3) = -43