10-12-2015
Mathematics

Answered

you receive 9 text messages in 12 minutes. What is the rate of text messages per hour?

Verified Answer :

apologiabiology apologiabiology

10-12-2015

remember 60 mins per hour
9 per 12
use ratio and proportion
9:12=x:60
9/12=x/60
multiply both sides by 60
540/12=x
45=x
the answer is 45

a shortcut is yo know that 12 times 5=60 so
9 times 5=answer since 12 times 5=60

answer isi 45

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