All tubes of watercolor paint at an art supply store have the same price. An artist has a coupon for $0.80 off each tube of paint she buys. She buys 12 tubes of paint and pays a total of $70.20 after the coupon is applied. Write an equation to find r, the regular price of each tube of paint. No need to solve the equation.

R=70.20-$0.80(12)

Step-by-step explanation:

answer: evaluate the objective function at each vertex to determine which - and -values, if any, maximize or minimize the function. example: find the minimum value and maximum value of the objective function f ( x , y ) = 4 x + 5 y , subject to the following constraints

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step-by-step explanation: