124k views
3 votes
Henry is buying school supplies for the start of th school year. For every 3 pencils he buys 2 pens . If Henry buys 21 pencils.how many total pencils and pens did Henry purchase

2 Answers

3 votes

Answer: He bought 7 pens.

Explanation:

21/3 = 7

User Sproketboy
by
5.0k points
4 votes

Answer:

14

Explanation:

So For every 3 pencils he buys, he buys 2 pens. The ratio is 3:2. You want to find another ratio that is 21:x, because he bought 21 pencils, but you don't know how many pens. You could also rewrite ratios into fractions so you would get 3/2 = 21/x. Move the variable and get 3/2x=21. So 3/2 multiplied by what is equal to 21? 3/2 multiplied by 14 is 21.

User BruceyBandit
by
6.0k points
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