How many five-letter codes can be made if no letter can be used twice? (There are 26 letters in the alphabet.)

Which pair of equations could not be used to solve the following equations for x and y?

Mary has 32 she bought 3 comic books that cost 4 each then she and her friend mowed a neighbor yard and earned 18

If postage costs $.54 for the first ounce and $.22 for the each additional ounce, calculate the cost of mailing a 10 - ounce envelope. A. $2.20 B. $5.08 C. $2.52 D. $5.40

If (-3, y) lies on the graph of y = (1/2) x, then y =

Ky wants to buy 3 shirts which were originally priced $49.96 each the store will discount the price of the third shirt and then apply a 7.1% tax to a total cost of all three shirts including the tax what will be the mean of the cost show your work

A pool service charges $40 per year for chemicals plus $70 per month for pool care. A second pool service's charges are shown in the table below. Number of Months (x) : 2, 3, 6, 8. Total Charge (y) : $190, $255, $450, $580.

What is the area of a rectangle with the length of 91 inches and a width of 45 inches?

What can 76 be divided by

At Kelli's skateboard shop, customers pay an upfront fee of $12 and then pay $3 per hour for each hour they use the skateboard. Write a rental equation for the cost of renting a skateboard at Kelli's shop. ht

Find the area of a square with length 6 1/3 inches. usethe appropriate unit of measurment