Admission to the movies costs $8 for adults and $4 for kids. The total bill for your entire extended family was $72. This scenario can be modeled by the equation 8a + 4k = 72. Which is not a possible combination of adults and kids?

3 adults and 12 kids

5 adults and 6 kids

7 adults and 4 kids

8 adults and 2 kids

Question

Admission to the movies costs $8 for adults and $4 for kids. The total bill for your entire extended family was $72. This scenario can be modeled by the equation 8a + 4k = 72. Which is not a possible combination of adults and kids?

 3 adults and 12 kids

 5 adults and 6 kids

 7 adults and 4 kids

 8 adults and 2 kids

johnweldon1993 · Answer

Well you try them each out...for example Choice A) 3 adults and 12 kids....plug in 3 for 'a' and 12 for 'k'

8a + 4k = 72

8(3) + 4(12) = 72
24 + 48 = 72
72 = 72

So this is not your answer

Try the others just like that...

mikezack123 · Answer

i got C @johnweldon1993  right?

johnweldon1993 · Answer

Sorry for the late response...no C is incorrect as well

7 adults and 4 kids so

8a + 4k = 72
8(7) + 4(4) = 72
56 + 16 = 72
72 = 72

So no C is not your answer

johnweldon1993 · Answer

Lets look at B

5 adults and 6 kids

8a + 4k = 72
8(5) + 4(6) = 72
40 + 24 = 72
64 = 72

Here is your answer