Problema Solution
the holmes family has 2 adults and 3 children the family uses an average of 1,400 gallons of water per week last month they had to houseguest's who stayed for a week assuming that the water usage is proportional to the number of people in the house about how much water did the household use during the guests visit?
Answer provided by our tutors
the Holmes family has 2 adults and 3 children or 2 + 3 = 5 family members
5 people use 1,400 gal of water per week
last month they had 2 guests who stayed for a week, or, there were 5 + 2 = 7 people in the house
we will assume that 7 people need x gallons of water per week
since the water usage is proportional to the number of people in the house we have:
5 : 1400 = 7 : x
by solving we find:
x = 1,960 gal
click here to see the step by step solution of the equation:
the household used 1,960 gallons of water during the guests visit.