David purchased some cookies at the cost of 5 for $4 and sold 4 for $5. He made a profit of $90. How many cookies did he purchase and sell to make that much money

Jesse and Lisa start a business tutoring students in math. They rent an office for $200 per month and charge $15 per hour per student.

A 12-oz cup of regular coffee at Starbucks has 13 times the amount of caffeine found in the same-sized serving of decaffeinated coffee. Together they contain 280 mg of caffeine. How much caffeine is in each type of coffee?

Shaquan's mother is trying to discuss the week's calendar with him. While she is talking he continues to work on the computer and turns up the radio. What communication roadblock is he using?

A contractor purchases 4 dozen pairs of padded work gloves for $58.56 SheShe incorrectly calculates the unit price as $14.64 per pair for the expense report. What is the correct unit price? What is the error?

Two sub-sandwich-shop workers serve approximately 100 sandwiches daily. Each worker can prepare four sandwiches in five minutes. Working together, how many sandwiches can they prepare in an hour?

Three pairs of gloves - a red pair, a blue pair, and a green pair-are in a drawer. If the gloves are removed at random without returning any to the drawer, what is the minimum number that must be removed in order to guarantee having a matched pair

If y=mx+b is the equation of a line perpendicular to the line y=5x-2, what is the value of m

What is y 3x=7 zero, postive, negative or undefined?

Which of the following should one consider when choosing a career

Solve for x. 3x = 2 5 A) 1 4 B) 2 15 C) 5 6 D) 6 5