Question

Tracy can type 45 words in 3 minutes. At that rate, how many minutes would it take Tracy to type 315 words?​

Answer 1

Answer: It will take Tracy 21 minutes to type 315 words

Explanation:

Set up a proportional relationship to solve for the number of minutes.

45 words = 3 mins

315 words = x mins.

`(45)/(315) = (3)/(x)` Cross multiply

45x = 945 Divide both sides by 45

x = 21

Answer 2

21 minutes

Explanation:

The rate that she types is 15 words in a minute

315/15 =

21 or 21 minutes