Question

Admission to the zoo costs $15 for adults and $5 for kids. The total bill for your entire extended family was $390. This scenario can be modeled by the equation 15a + 5k = 390. Which of the following is not a possible combination of adults and kids?

Answer 1

There are options?

Answer 2

9 adults and 51 kids
23 adults and 0 kids
21 adults and 15 kids
17 adults and 27 kids

Answer 3

just replace (a) by number of adults and (k) by number of kids and check if the equation is true...
the answer is
23 adults and 0 kids

Answer 4

hoblos is right.

Answer 5

23 adults, 0 kids.