How would you write this word problem as an equation? when the gas gauge on her car was on the 3/8 mark, karen pumped 15 gal. of gas into the tank in order to fill it. how many gal. of gas does the tank in karen's car hold?

When the solutions to each of the two equations below are graphed in the xy-coordinate plane, the graphs of the solutions intersect at two places. write the y-cordninates of the points of intersection in the boxes below in order from smallest to largest. y=2x y=x^2-3