7) David bought a computer that was 20% off the regular price of $1080. If an 8% sales tax was added to the cost of the computer, what was the total price David paid?
8) Suzanne bought a sweater at the sale price of $25. The original cost of the sweater was $40. What percent represents the discount that Suzanne received when buying the sweater?
9) Leo bought a used car for x dollars. One year later the value of the car was 0.88 x. Which expression is another way to describe the change in the value of the car?

Question

21-02-2018
Mathematics

contestada

7) David bought a computer that was 20% off the regular price of $1080. If an 8% sales tax was added to the cost of the computer, what was the total price David paid?
8) Suzanne bought a sweater at the sale price of $25. The original cost of the sweater was $40. What percent represents the discount that Suzanne received when buying the sweater?
9) Leo bought a used car for x dollars. One year later the value of the car was 0.88 x. Which expression is another way to describe the change in the value of the car?

Respuesta :

Otras preguntas

The sector of a circle with a 12 in. radius has a central angle measure of 60°.What is the exact area of the sector in terms of π ? Enter your answer in the

which factor is related to seatbelt use in teens? its parenting

The proponents of the two-factor theory of avoidance learning suggest that the first stage of avoidance learning involves _____ and then the avoidance response

What type of home mortgage has payments that can change? A.home equity loans B.federally insured mortgage C.fixed-rate mortgage D.variable-rate mortgage

Which nation has one of the highest poverty rates in the advanced world?

Read the sentence below and choose the answer that could most likely be substituted for the word instigate. Unfounded imputations made against conscientious ci

Read the scenario. A woman is accused of a crime. She says that she was nowhere near the scene of the crime. Her friends who were with her at the time are afrai

what is the best way to solve this?

A game involves rolling a fair six-sided die. If the number facing upward on the die is a whole number multiple of three, the player wins an amount equal to the

In november 1917, what did lenin do to prepare for the bolshevik revolution?

ACCESS MORE

cedarwood79 cedarwood79 · Answer 1 · 2018-02-24T00:08:01+01:00

Hello there! I can help you!

7. Okay. So the computer was originally $1,080, and the discount is 20%, but David would still have to pay 80% of the original price. To find the sale price, let's multiply. 1,080 * 80% (0.8) is 864. The sale price of the compuet is $864, but now we must add the sales tax to find the total price. We will multiply by 108%, because 100% (representing the price + 8% is 108%, and doing this will get us stright to the total price. 864 * 108% (1.08) is 933.12. There. David paid a total price of $933.12 for the computer.

8. Okay. So we are looking for the amount of discount for the sweater Suzanne bought. First off, let's subtract the prices to find the difference. 40 - 25 is 15. Now, let's divide that by 40 (the original price) to find the discount. 15/40 is 0.375. Or 37.5% when converted into a percentage. There. Suzanne received a 37.5% discount on the sweater when she bought it.

9. So the car was bought for x dollars. 0.88 represents 88%, so the value of the car is 88% of the previous year. An expression that is a way to describe the change in car value is x * (100 - 0.12)^t, because you car loses 12% of the remaining value each year, which leaves 88% of it remaining, and having the t as the exponent represents the number of years. That expression helps find the value of the car currently and can help you compare the values.