How do I write an equation for #17?
2 answers:
let's say we have two phone companies, A and B, A charges $16.95 monthly and $0.05 a minute, B $22.95 monthly and $0.2 a minute.
company A
1 minute...................... $16.95 + 0.05(1)
2 minutes.................... $16.95 + 0.05(2)
3 minutes.................... $16.95 + 0.05(3)
x minutes.................... $16.95 + 0.05(x)
company B
1 minute...................... $22.95 + 0.02(1)
2 minutes.................... $22.95 + 0.02(2)
3 minutes.................... $22.95 + 0.02(3)
x minutes.................... $22.95 + 0.02(x)
when will the cost of each plan be the same? well, that happens when 16.95 +0.05x = 22.95 + 0.02x.
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