# math

The table shows the relationship between red and blue marbles.

Red marbles (r) 4 10 11 18 29
Blue marbles (b) 1 7 8 15 26
Is the relationship between red and blue marbles additive or multiplicative? Write the relationship as an equation.

A. additive; r = b + 3
B. additive; b = r + 3
C. multiplicative; r = 3b
D; multiplicative; b = 3r

Three out of every five straws in a multi-colored package are red. How many straws in a package of 30 straws will be red?

____ straws

Javaland sells a cup of coffee for \$2.50.

​​How many cups of coffee can be purchased with \$10?
Ben wants to buy 7 cups of coffee for his office. He has \$18. Can he buy 7 cups of coffee? ​Explain your answer.
​Can a person spend exactly \$12 on cups of coffee at Javaland? ​Explain your answer.

Sergio is making punch for a school party. The recipe he is using calls for 3 cups of fruit juice to make 7 cups of punch. He made a ratio table to help him determine how much fruit juice he will need.

Cups of fruit juice 3 15 90
Cups of punch 7 35 210
Sergio thinks he will need 90 cups of fruit juice to make 210 cups of punch. Explain his method.
How many cups of fruit juice would Sergio need to make 154 cups of punch? Explain your calculations.

also happy halloween!!!

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1. the numbers look like this sorry

cups of fruit juice 3 15 90
cups of punch 7 35 210

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2. lol with space its 3 and 7 15 and 35 and 90 and 210

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Reiny
4. ok for the first one i pick c
the 2nd one i pick maybe 15

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ok for the first one i pick c <------ no, just look at any pair
e.g. 10, 7 . Is 10 equal to 3 times 7 ??

the 2nd one i pick maybe 15 <---- NO, "maybe" 15 ? Is 15 equal to 3/5 of 30? Are you just guessing?

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Reiny
6. I already got help its fine

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7. Umm I don't know what number 2 is

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