Which expression is equivalent to 9p+9p

18p? I don't know what other expressions could be equivalent. I just added 9p to 9p to get my answer.

a function could be identified in 3 ways either on a chart,graph, or ordered pairs. first a function is that each point has its own. the rule is that there can be many x's to one y but there can not be 2 x's at different y's. so on a graph when you put a straight line through the y's there should be one dot only to be a function.

step-by-step explanation:

it would open into a square depending on the type of envelope i’m not sure about the second part