7. Mr. Newman bought 8 tickets to a chili supper and spent a total of $30. He bought a combination of adult tickets for $5 each

Question

4 years ago

10

7. Mr. Newman bought 8 tickets to a chili supper and spent a total of $30. He bought a combination of adult tickets for $5 each

and child tickets $3 each. Which system of equations below will determine the number of child tickets, c, and the number of adult tickets, a, he bought?

Mathematics

2 answers:

igor_vitrenko [27] · Answer 1 · 2021-12-10T19:09:37+03:00

igor_vitrenko [27]4 years ago

7 0

So, there are two equations.

5a + 3c = 30

a + c = 8, therefore, a = 8 - c

5a + 3c = 30

5(8 - c) + 3c = 30

40 - 5c + 3c = 30

-2c = -10

c = 5 , So a = 3

iragen [17] · Answer 2 · 2021-12-10T20:13:55+03:00

iragen [17]4 years ago

3 0

The answer is D. 5a + 3c = 30 a + c = 8