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fenix001 [56]
3 years ago
14

Please help me finish this part of my study guide

Mathematics
2 answers:
Mazyrski [523]3 years ago
4 0

Answer:

(5,15)

Step-by-step explanation:

We know that 225 = 15a + 10c, and he purchased a total of 20 tickets, so

a + c = 20, using this, we know that c = 20 - a, we can substitute this for c in 225 = 15a + 10c to get:

225 = 15a + 10(20 - a) =

225 = 15a + 200 - 10a

225 = 5a + 200

25 = 5a

a = 5

Now we substitute 5 for a:

225 = 15a + 10c

225 = 15(5) + 10c

225 = 75 + 10c

150 = 10c

c = 15

so a = 5 and c = 15, the solution is (5,15)

P.S. I'm the guy who did your other question

enyata [817]3 years ago
4 0
5,15 i think sorry if wrong
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