SOLUTION: A construction crew foreman is buying k two-by-four boards for farming a house. She is also buying j nail guns for the crew. Each board costs 3.75 and each nail gun costs 159.75. T

Question 1095756: A construction crew foreman is buying k two-by-four boards for farming a house. She is also buying j nail guns for the crew. Each board costs 3.75 and each nail gun costs 159.75. The nail guns are on sale with a 20% discount. Which equation could be used to calculate the total amount of her purchase,t?
A. T=3.75k+159.75j-0.2j
B. T=3.75k+159.75j-0.2j(159.75j)
C. T=3.75k+159.75j+0.2j(159.75j)
D. T=3.75k+159.75j-20(159.75j)

Answer by Theo(13342) (Show Source): You can put this solution on YOUR website!
the answer should be:

3.75 * k + 159.75 * j - .2 * 159.75 * j

i would have said selection B, but you have too many j's in there.

the nail guns are on sale with a 20% discount.

the price for each gun is therefore 159.75 - .2 * 159.75.

factor out the 159.75 and you get 159.75 * (1 - .2).

simplify to get 159.75 * .8.

the price of a nail gun is equal to .8 * 159.75 which is equal to 127.8

assume 20 pieces of wood and 5 nail guns.

the total cost should be 3.75 * 20 + 127.8 * 5 = 714.

my formula is 3.75 * k + 159.75 * j - .2 * 159.75 * j

that would be 3.75 * 20 + 159.75 * 5 - .2 * 159.75 * 5

evaluate that formula and you get a total of 714.

the formula i gave you is correct.

none of your selections would come up with the correct answer.

selection B would if you dropped that extra j.

selection B should be T = 3.75k + 159.75j - .2(159.75j).

or it could be T = 3.75k + 159.75j = .2j(159.75).

either one of these would be correct.

RELATED QUESTIONS
To start the construction o a rest house. the engineer advice his foreman to erect five... (answered by Alan3354)

Which of the following would require finding the volume?. F) Buying enough carpet for the (answered by Fombitz)

a family is buying capetibg for two rooms.One room measures 15 feet by 17.5 feet and the... (answered by checkley77)

A special-interest group has conducted a survey concerning a ban on hand guns. Note: A... (answered by ewatrrr)

If print wheels sell for $6.50 each or $ 60.00 per dozen, how much is saved by buying a... (answered by jim_thompson5910)

A coat is on sale for 1/4 off. If the sale price is $72, then yow much is saved by buying (answered by scbmaths)

I so need help with this ASAP, I have been working on it for days, Algebra and I are just (answered by ankor@dixie-net.com)

The math club and science club had fundraisers to buy supplies for a hospice. the math... (answered by ptaylor)

What is the probability (rounded to the nearest whole percent) that an adult will be a... (answered by fractalier)