A phone company charges a base fee of $12 per month plus an additional charge per minute. The monthly phone cost CC can be represented by this equation: C= 12 + a * m, where a is the additional charge per minute, and m is the number of minutes used. Which equation be used to find the number of minutes a customer used if we know a and C? m = C - 12a m = C/a - 12 m = (C-12)/a m = (C - 12) - a
Equations and Inequations
Equations and inequalities describe the relationship between two mathematical expressions.
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A linear function can just be a constant, or it can be the constant multiplied with the variable like x or y. If the variables are of the form, x2, x1/2 or y2 it is not linear. The exponent over the variables should always be 1.
A phone company charges a base fee of $12 per month plus an additional charge per minute. The monthly phone cost CC can be represented by this equation:
C= 12 + a * m, where a is the additional charge per minute, and m is the number of minutes used.
Which equation be used to find the number of minutes a customer used if we know a and C?
m = C - 12a
m = C/a - 12
m = (C-12)/a
m = (C - 12) - a
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