Homework Help: math

Posted by b6 on Monday, January 21, 2013 at 8:57am.

Daniel needs to purchase 5.6 meters of tape for a project. If each roll of tape contains 80cm andcosts $2.50, what is the total cost of the tape Daniel must buy?
x=cost of tape
meters of tape/cost
5.6/x=.8/2.5
x=17.5
I have the cost is $17.50
Is this correct?
They want us to do a check for this
I am not sure how to do the check? Can you help?
Thanks

math - Reiny, Monday, January 21, 2013 at 10:15am
5.6 metres = 560 cm
each roll has 80 cm
number of rolls = 560/80 = 7
cost = 7(2.5) = 17.5

you are correct

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