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evablogger [386]
3 years ago
12

Help please!!! thanks

Mathematics
1 answer:
Rom4ik [11]3 years ago
3 0

Answer:

27

Step-by-step explanation:

first we can simplify by dividing by r

\frac{9 {r}^{2} }{r}  =  \frac{9 \times r \times r}{r}  =  9 \times r \times 1 =  9r

the r on the bottom of the fraction will cancel out one of the r's on top, this happens because anything divided by itself is 1, thus r divided by r is 1

finally we can evaluate when r =3,

9r = 9(3) = 27

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