Ajumbo-size 70-ounce drink at a certain gas station has 820-calories. how many calories are there in a 21-ounce drink?

246 calories in 21 oz

Step-by-step explanation:

Set up a proportion.

70 oz / 820 calories = 21 oz / x       Cross muliply

70x = 820*21                                     Combine the right.

70x = 17220                                      Divide by 70

70x/70 = 17220/70                          

x = 246 Calories

to rewrite a literal equation you may need to divide by a number, or by a variable.

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step-by-step explanation

2r= 2300

r =1150