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Mathematics 7 Online
jcole132006:

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.

justus:

Hello there. We can simplify 9:3 to 3:1 and y = 3x is used to substitute 30 guests in for x. Thus y= 3(30), y= 9.

jcole132006:

thank you

justus:

y=90*

justus:

Sorry my mistake.

jcole132006:

you are fine thanks

justus:

She needs 90 balls for 30 guests.

justus:

No problem. :)

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