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SpyIntel [72]
3 years ago
11

Kalon and his friend Marna own a chimney sweep service company. Working together, they can clean a chimney in 1 5/7 hours. If it

takes Kalon 4 hours to clean a 20-foot chimney by himself, how long does it take Marna to clean the same size chimney by herself?
Mathematics
1 answer:
aleksley [76]3 years ago
5 0
So to set up the equation we have: <span><span><span>4M</span><span>4+M</span></span>=<span>127</span></span>
<span>28M=12(4+M)</span>
<span>28M=48+12M</span>
<span>28K−12M=48</span>
<span>(28−12)M=48</span>
<span>16K=48</span>
<span>M=<span>4816</span></span>
<span>M=3</span> So Marna can clean the chimney alone in 3 hours
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Answer:

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Step-by-step explanation:

Given

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x² + 4x = 7

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x² + 2(2)x + 4 = 7 + 4

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4 0
3 years ago
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3 years ago
The sum of four and the product of three and a number x.
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Marni danced in a contest to raise money for an animal shelter. Marni raised $30 plus $1.80 per minute that she danced. She rais
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