What does the question mark represent if the area of this shape is 21

The area 21 of a parallelogram is base times height 7. So the base must be 3.

3

Note the 1 is irrelevant; it could be anything and the area wouldn't change.

question: how many people can she serve?

answer: she can serve 16.66666667 people. so she can only give 16 people a complete serving.

question: does she have enough ice cream for her guests?

answer: no. explanation: she only has enough for 16 people to have a full serving. however, she can give a 17th person a partial serving.

answer:   b

step-by-step explanation:

x2 = 16

x can not be a negative number because 16 is positive

the only answer would be positive 8