Here's the question you clicked on:
ryamoore1
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?
9 adults and 51 kids 23 adults and 0 kids 21 adults and 15 kids 17 adults and 27 kids
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