How do I graph y = −x+7?

Question 5 spring semester final exam math evaluate

The square root of 9x plus 7 plus the square rot of 2x equall to 7

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.)