Can someone explain domain and range?

A store purchased a DVD for $12.00 and sold it to a costumer for 50% more than the purchase price. The costume was charged a 7% tax when the DVD was sold. What was the costumer's total for the DVD?

Y=x+3 is it a linear function?

Jeremy looked at this table of prices and said the cost for renting a bike is $7.00 per hour. A 2-column table with 3 rows. Column 1 is labeled Hours with entries 2, 4, 6. Column 2 is labeled Cost (dollars) with entries 7.00, 14.00, 21.00.

If only 10 percent of the 40 math homework problems are multiple choice, how many problems are multiple choice? a. 2 b. 4 c. 10 d. 40

Evaluate z+z + z for x=2, y=-3, z = - 4. a. - 6 b. - 12 c. 12 d. - 9

stan cut two pieces of crown molding for his family room that were 8 feet 7 inches and 12 feet 11 inches. what was the total length of the molding?

A shoe store is having a 35% off clearance sale. Sheila has a membership card which gives her an additional 20% discount every time she shops there after all other discounts are taken.

Douglas Stationery sells cards in packs of 6 and envelopes in packs of 8. If Jesse wants the same number of each, what is the minimum number of cards that he will have to buy?

In order to make a teaspoon of honey, a honeybee must make 154 trips. If a honeybee made 924 trips, how many teaspoons of honey could it make?

Find $5,875 : $6,030 rounded to the nearest tenth of a percent.