The cost of pens varies directly with the number of pens. One pen costs $2.00. How do you find k in the equation for the cost of pens, use C=kp, and how do you find the total cost of 12 pens?
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Total coast of 12 pens is 2 multiply 12 _$24.00
c equal to kp so p equals to 2 so take p that side so your answer is 2C equal to k
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