To call BC it costs 67 ¢ per min There is also an additional charge of $3.50 if you call collect Al is making a collect call to BC Write an expression to describe the cost of the call lasting t min

Answer 1

The cost (let's call it C) of a call t minutes long starts with a charge of $3.50, or 3.5. So far, C(t)=3.5. Add on the $0.67 per t, and C(t)= 3.5+.67t.

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Happy mathing!

Liz Z