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3 years ago

20 feet of lumber cost $138.40. what is the cost per foot

Mathematics

2 answers:

Romashka [77]3 years ago

8 0

Answer: $6.92

Step-by-step explanation: Whenever you see the word per in a math problem, that means division. So right now, you could set up an equation that looks like this. 20L=130.40 (let L mean cost per foot of lumber). If you want to find the cost per foot you need have 1L or just L on one side of the equation. Well, the easiest way to do that would be to divide by 20 on both sides. And that would get you L= 6.92. And since L means the cost per foot of lumber, that cost would be $6.92. Hope this helps!

Yanka [14]3 years ago

5 0

$138.40/20 = $6.92.
so, the cost per foot would be $6.92

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