You fill your car with 15 gallons of gas at a cost of $45 use fractional notation how do you write the proposition that shows how much 5 gallons of gas costs use extra represent the unknown cost
Let x represent the unknown cost of 5 gallons of gas. The proposition in fractional notation would be:
15 gallons / $45 = 5 gallons / x
To find the unknown cost, we can set up a proportion:
15 / 45 = 5 / x
Cross multiply to solve for x:
15x = 45 * 5
15x = 225
x = 225 / 15
x = $15
Therefore, 5 gallons of gas costs $15.