Write and expression for “the sum of d and 9”

Sum means to Add.

So the sum of d and 9 would be d + 9

you should pay $0.88

what is the image?

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: