17. He needs 2cupsof flour to make 20 biscuits so he needs x cups if flour to make 30 biscuits [tex] \frac{2}{20} = \frac{x}{30} [/tex] [tex]x = \frac{2 \times 30 }{20} = \frac{60}{20} = 3[/tex] 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. [tex] \frac{30}{2} = \frac{x}{5} [/tex] [tex]x = \frac{30 \times 5}{2} = \frac{150}{2} = 75[/tex] 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. [tex] \frac{2}{15} = \frac{x}{60} [/tex] [tex]x = \frac{2 \times 60}{15} = \frac{120}{15} = 8[/tex] So she walks 8 blocks in 60 minutes. So; the answer is: 8
