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amm1812
3 years ago
10

How do you do all these problems? Don’t do 20 and 21.

Mathematics
1 answer:
sergiy2304 [10]3 years ago
3 0
17. He needs 2cupsof flour to make 20 biscuits so he needs x cups if flour to make 30 biscuits
\frac{2}{20}  =  \frac{x}{30}
x = \frac{2 \times 30 }{20}  =  \frac{60}{20}  = 3
So he needs 3 cups of flour to make 30 biscuits.
So the answer is B

18. She charges 30$ for 2 hours so she charges x$ for 5hours.
\frac{30}{2}  =  \frac{x}{5}
x =  \frac{30 \times 5}{2}  =  \frac{150}{2}  = 75
so she charges 75$ for 5 hours.
So the answer is I

19. (an hour is 60 minutes)
She walks 2 blocks in 15 minutes so she walks x blocks in 60 minutes.
\frac{2}{15}  =  \frac{x}{60}
x =  \frac{2 \times 60}{15}  = \frac{120}{15}  = 8
So she walks 8 blocks in 60 minutes.
So; the answer is: 8

please mark as brainliest.
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