Question

A store has apples on sale for $3.00 for 2 pounds. How many pounds of apples can you buy for $9? If an apple is approximately 5 ounces, how many apples can you buy for $9? Explain your reasoning.

Answer 1

Since 2 pounds is $3 and you have $9, you would do: 

$\frac{3}{2} = \frac{9}{x}$ , x= # of pounds of apples

You do cross multiplication to get:

$3x=18$

x=6      

1 lb= 16 oz

So $6*16=96$   to get the number of ounces you can buy for $9.

Then divide 96 by 5, so that is ABOUT 19 APPLES.

Answer 2

we know that

A store has apples on sale for $$3.00$ for $2$ pounds

Part a) How many pounds of apples can you buy for $$9$?

by using proportion

$\frac{3}{2}\frac{usd}{pound} =\frac{9}{x} \frac{usd}{pound} \\ \\ 3x=9*2\\ \\ x=\frac{18}{3} \\ \\ x=6 pounds$

therefore

the answer Part a) is

$6 pounds$

Part b) If an apple is approximately $5$ ounces, how many apples can you buy for $$9$?

we know that

$1 pound=16 ounces$

step 1

convert ounces to pounds

$1apple=\frac{5}{16}pounds$

by using proportion

$\frac{1}{\frac{5}{16}}\ \frac{apples}{pounds} =\frac{x}{6} \frac{apples}{pounds}\\ \\ x\frac{5}{16} =6\\ \\ x=\frac{16*6}{5} \\ \\ x=19.2 apples$

therefore

the answer part b) is

about $19 apples$