you have approximately 1/4 of tank of gas. your tank holds 20 gallons. how much gas do you have left? if you plan to fill the tank, how many gallons will you purchase? if gas cost $21/2 per gallon, how much will it cost you to fill up

Step-by-step explanation:

if you have a quarter tank then what is empty is 15 gallons because 20*3/4=15

you now need to fill up the 15 gallons, if each gallon is 21/2 dollars then 15*21/2 should give us a price. 21/2=10.5

15 gallons*10.5 dollars=$157.5 for the final price

3/20

step-by-step explanation:

well, there are 20 outcomes, and 3 of them you want. so, 3/20