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jek_recluse [69]
3 years ago
6

Leila runs 7 miles in 60 minutes. at the same rate, how many miles would she run in 24 minutes?

Mathematics
1 answer:
igomit [66]3 years ago
5 0
Set it up as a ratio:

7/60=x/24

Cross multiply to get an equation, then solve.

60x=7x24
60x=168
x=2.8
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How to solve using substitution<br> y=3/4X+5<br> 4x-3y=-1
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Please, use parentheses to enclose each fraction:
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Let 's now solve the system   

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We are to solve this system using subtraction.  To accomplish this, multiply the first equation by 3 and the second equation by 4.  Here's what happens:

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Then we have 

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We were given equations   
</span><span>y=3/4X+5
4x-3y=-1

We can subst. x=8 into either of these eqn's to find y.  Let's try the first one:

y = (3/4)(8)+5 = 6+5=11

Then x=8 and y=11.

You should check this result.  Subst. x=8 and y=11 into the second given equation.  Is this equation now true?</span>
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