Lorne subtracted 6x^3-2x+3 from -3x^3+5x^2+4x-7 identify the steps Lorne used to find the difference

The equation y=mx+b is the slope-intercept form of the equation of a line. what is the equation solved for b? y-m=b y-mx=b y/mx=b y/m-x=b

Question 10jur's car can travel 340 miles on 12 gallons. jack's car can travel 390 miles on16 gallons. which person has the best mileage (miles per gallon) and what istheir mileage?

I’m stuck on this equation, anyone got the answer?