Can some please do these for me

Mathematics

1 answer:

Contact [7]3 years ago

4 0

12. $\frac{r-3}{-4-(-8)} = -5$
$\frac{r-3}{4} = -5$
r - 3 = 4(-5)
r - 3 = -20
r = -20 + 3
r = -17

13. $\frac{r-2}{-2-5} = \frac{5}{6}$
$\frac{r-2}{-7} = \frac{5}{6}$
6(r - 2) = -7(5)
6r - 12 = -35
6r = -35 + 12
6r = - 23
r = $\frac{-23}{6}$

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aleksklad [387]

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4 years ago

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3 years ago

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Step-by-step explanation:

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4 years ago

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pogonyaev

Dividing fractions is basically multiplying.

3/2 divided by -9/8

When you divide with fractions, you find the reciprocal of the 2nd number (in this case -9/8), which means you flip it, giving you 8/-9. When you do this, you change the sign to multiplication. Now, just solve:

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Hope this helps! :)

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3 years ago