Restating the conditions of problem 1, the cost to buy t-shirts is $5.00 for the first 10 shirts, $4.00 for each additional shirt up to 50, and $3.00 for each shirt above 50. if you purchase 100 shirts, what is the average cost per shirt?

Solve this system of equations. 12x − 18y = 27 4x − 6y = 10

Use the quadratic formula to solve the equation. if necessary, round to the nearest hundredth. x^2 - 8 = -6x a. –7.12, 1.12 b. 7.12, –1.12 c. 7.12, 1.12 d. –7.12, –1.12

He weights of 2-pound bags of best dog food are approximately normally distributed with a given mean  and standard deviation  according to the empirical rule, what percentage of the bags will have weights within 3 standard deviations of the mean? 47.5%68%95%99.7%