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dybincka [34]
2 years ago
9

The length of a rectangle is 5 feet less than its width. If the area of a rectangle is 84 square feet, find its dimensions.

Mathematics
1 answer:
Lyrx [107]2 years ago
7 0

Answer:

7 x 12

Step-by-step explanation:

a=l *w

84=l*w\\w=l+5\\

these equations we know, so we can use them like this

84=l*(l+5)\\84=l^2 +5l\\

I then plugged this equation into the desmos calculator to get the answer

l=7

we then plug this into a previous equation

w=l+5\\w=7+5\\w=12

to get our answer l=7, w=12

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