sarahlikewoe
4. The cost of a long-distance telephone call is given by the function
C(m) = 0.1m + 0.95
where m is the length of the call in minutes. Determine how long a phone call can be made for $5.95.
100 minutes
50 minutes
45 minutes
59 minutes
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Coolsector
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5.95 = 0.1m + 0.95
solve for m
sarahlikewoe
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how do i do tht again ?
anonymous
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when was your book written, 1976?
who pays for long distance calls at ten cents a minute?
Coolsector
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subtract 0.95 from both sides
Coolsector
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what do you get ?
anonymous
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\[595=10m+95\] is a good start, work with pennies
Coolsector
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lol
anonymous
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subtract 95 divide by 10
sarahlikewoe
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59?
sarahlikewoe
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@Coolsector
Coolsector
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5.95 = 0.1m +0.95
subtract 0.95 from both sides
5 = 0.1m
divide by 0.1 (its like multiplying by 10) both sides
m=50
sarahlikewoe
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Ohhh ! ok
Coolsector
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:)