Question

Joel wants to buy a new tablet computer from a store having a 20% off sale on all tablets. The tablet he wants has an original cost of $190. He also wants to make sure he has enough money to pay the 5% sales tax. Use this information to answer.

**Remember that tax is calculated on the discounted price, not the original $190 price.

Joel uses the incorrect expression 0.95(190)(0.8) to calculate his total. He finds that the tablet will cost him a total of $144.40. Describe his error and write the correct expression. Answer in complete sentences. ( Question 1)

How much will Joel pay for the tablet? ( question 2)


A
$179.55

B
$159.60

C
$144.40

D
$39.90

Answer 1

Answer: A

Explanation:

Answer 2

190 *.80 *(1.05)

Instead of adding the sales tax, he subtracted the sales tax.

159.60

Explanation:

If Joel gets 20% off, he still has to pay (100-20) or 80%

The cost of the tablet is now 190 * .80

Then he has to pay 5% sales tax.

The tax is the prices times 5% plus the original price

190 *.80 *(1+.05)

or 190 *.80 *(1.05)

Instead of adding the sales tax, he subtracted the sales tax.

The total he needs to pay is

190 *.80 *(1.05)

159.60

Hope this helps :)

-ilovejiminssi♡