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unit rates and proportion

Mathematics
Tutor: None Selected Time limit: 1 Day

A cafe served 180 pickles with 60 sandwiches. If the ratio of sandwiches to pickles is always constant, explain how you can use unit rates and proportion to find how many pickles are needed to serve 32 sandwiches.

Apr 8th, 2015

The ratio of pickles to sandwiches is 180 : 60 which reduces to 3 : 1

The unit rate then is 3 pickles per sandwich or just 3.

If x = the number of sandwiches,  and y = the number of pickles

Then,

y = 3x

For 32 sandwiches

y = 3(32) = 96 pickles

Apr 7th, 2015

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