for what value of k of the pair of equations 3 X + 4 Y + 2 is equals to zero and 9 X + 12 Y + K is equals to zero represents coincident lines ​

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.)