anonymous
  • anonymous
Solve the problem. One gallon of a driveway sealant covers an area of 190 ft2. How many gallons of the sealant are needed to cover a 760 ft2 driveway?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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mathstudent55
  • mathstudent55
This is a proportion question. Do you know how to set up a proportion?
anonymous
  • anonymous
no
anonymous
  • anonymous
when i tried it i got 6

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mathstudent55
  • mathstudent55
You set up two ratios and set them equal to each other.
mathstudent55
  • mathstudent55
You are given one ratio: 1 gallon : 190 ft^2
mathstudent55
  • mathstudent55
The other ratio has an unknown. It's the number of gallons. Let's call it x. x gallons : 760 ft^2
mathstudent55
  • mathstudent55
Now you set the two ratios equal. It's easier to understand if you express the ratios as fractions. |dw:1371502440908:dw|
mathstudent55
  • mathstudent55
Now you cross multiply and solve for x.

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