Natalie makes sparkling juice by mixing 2 cups of sparkling water with every 3 cups of apple juice. How much sparkling water does Natalie need if she uses 15 cups of apple juice? 1. 10 cups
2. 20 cups
3. 30 cups
4. 45 cups

10 cups

Step-by-step explanation:

15/3=5

5*2=10

10 cups of sparkling water for 15 cups of apple juice

38.5

step-by-step explanation:

lets say, first number = r

second number = 3r+7

total = 49

(r)+(3r+7)= 49

4r+7 = 49

4r = 42

r = 42/4

r= 10.5

3r+7 = 3(10.5)+7 = 38.5

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