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?
a.9 adults and 51 kids
b.17 adults and 27 kids
c.21 adults and 15 kids
d.23 adults and 0 kids

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?
a.9 adults and 51 kids 
b.17 adults and 27 kids 
c.21 adults and 15 kids
d.23 adults and 0 kids

hoblos · Answer

in the given equation a= number of adults and k= number of kids
so you just have to replace the numbers for each case and see if you get 390
the final solution of the question is (d)