Answer:
2.5 gallons of gas
Explanation:
Note : we have a proportional relationship between the two variables
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He used 3/4 gallon of gas to mow 3/10 of the lawn
Then
He has to use 1/4 gallon of gas in order to mow 1/10 of the lawn
( we divided both sides by 3)
Then
He has to use 10 × 1/4 gallons of gas to mow 10/10 of the lawn
What that means is :
He has to use 10/4 gallons of gas to mow the entire lawn
In other words :
He has to use 2.5 gallons of gas to mow the entire lawn
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Alex is mowing a 145.5 square feet lawn. He used 3/4 gallon of gas to mow 3/10 of the lawn. How many gallons of gas are needed to mow the entire lawn