hank's pickup can travel 80 miles on 4 gallons of gas. how many gallons will hank's pickup need to travel 40 miles?

2 gallons of gas

Step-by-step explanation:

if there is 4 gallons for 80 and there would then be 40 which is half of 80 then there would be half as much of the gallon of gas

-8/2y-8=5/y+4-7y+8/y^2-16

we move all terms to the left:

-8/2y-8-(5/y+4-7y+8/y^2-16)=0

we can not solve this equation