Dave purchased 3 notebooks for a cost of $6.29 each before tax. He gave the cashier $20.00. If the sales tax on his purchase was 6%, how much money should Dave have
received back from the cashier, to the nearest penny?

Asalesperson earns $320 per week plus 8% of her weekly sales. the expression representing her earnings is 320 + 0.08x. which of the following describes the sales necessary for the salesperson to earn at least $1000 in the one week?

Ineed to know the answer to this algebra question.

For problems 29 - 31 the graph of a quadratic function y=ax^2 + bx + c is shown. tell whether the discriminant of ax^2 + bx + c = 0 is positive, negative, or zero.