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rusak2 [61]
3 years ago
5

Blake mows a half acre of lawn for his grandparents every two weeks. If Blake has already mowed three-fifths of the lawn, how ma

ny more square feet must he mow?
Mathematics
1 answer:
Slav-nsk [51]3 years ago
7 0
To answer this you will need to know that there are 43,560 square feet in 1 acre.

1. Half of this is 43560/2 or 21780 square feet.

2. Out of this amount Blake has already mowed 3/5 of the lawn. This means he must mow 2/5 (1 - 3/5) more.

2/5 of 21,780 ft.² can be represented this way:

2/5 x 21780 =?

He needs to mow 8712 ft.² more.
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Answer:

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<em>Additional comment</em>

A "two-step" linear equation like this one is usually solved by subtracting the unwanted constant, then dividing by the coefficient of the variable. Here, we have done those steps in reverse order. This makes the numbers smaller and  eliminates the coefficient of the variable. Sometimes I find it easier to solve the equation this way.

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