Question

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

Answer 1

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

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