Rachel decided to have bouncy balls as a party favor. She determines that her ratio of bouncy balls to guests is 9:3. Explain how to find the number of balls needed for 30 guests.
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Answer:
Cross multiply the cross that doesn't involve x and divide by the number across x. The answer is 90.
Step-by-step explanation:
Start by creating the question. What are you looking for? Resemble it with 'x':
First step (cross multiply) :
9x30=270
Second step (Divide with the number that is across 'x') :
270/3= 90
x=90
(x) Balls:90
How to double check:
9:3
90:30
Are they equivalent to eachother?
If yes then you are correct.
Hope this helped! :D
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