Let x be the cost of 5 gallons of gas.
We know that 15 gallons of gas cost $45.
So, we can set up a proportion as follows:
15 gallons / $45 = 5 gallons / x
Simplify the proportion:
15/45 = 5/x
Divide both sides by 15:
1/3 = 5/x
Cross multiply:
1x = 15
x = $15
Therefore, 5 gallons of gas will cost $15.
You fill your car with 15 gallons of gas at a cost of $45 using fractional notation. How do you write a proportion that shows how much 5 gallons of gas will cost use X to represent the unknown
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