kimshen kimshen

26-04-2016
Mathematics

contestada

isobel and marnie volunteer at a daycare center Isobel works 3 hours for every 2 hours marine works. if the two girls together work 20 hours on month, how many hours does Isobel work?

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clernips clernips

26-04-2016

i=1.5m
m+1.5m=20
2.5m=20
m=8
20-8=12
Isobel worked 12 hours.

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