The graph shows two lines, a and b. part a: how many solutions does the pair of equations for lines a and b have? explain your answer. part b: what is the solution to the equations of lines a and b? explain your answer.

Fatima plans to spend at least $15 and at most $20 dollars on sketch pads and pencils. if she buys 2 sketchpads, how many pemcils can she buy while staying in her price range? fatima can buy between and pencils. ? (type whole numbers. use ascending? order.)