A bag contains 10 pounds of dog food. A family feeds their dogs 0.85 pound of dog food a day. How much dog food is left in the bag after 7 days?

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Answer 1 · 2018-06-14T14:30:13

#4.05# pounds of dog food are left.

Let #x=# how many days have passed and let #y=# how much dog food is left in the bag,

Then:

#10-0.85x=y#

Here

#x = 7#

So

#10-(0.85*7)=y#

#10-5.95=y#

#y=4.05#