harry wants to hire a painter to paint his house jackson charges 360 plus 12 per hour. davis charges 279 plua 16 per hour. when will the two costs be the same
2006-09-05 13:00:46 · 11 answers · asked by toast4_3 3 in Science & Mathematics ➔ Mathematics
do this equation:
let x be the number of hours for work
360+12x=279+16x
360-279=16x-12x
4x=81
x=20.25 hours
Answer: they have to work for 20 hours and 15 minutes to have equal pay!
2006-09-05 13:04:50 · answer #1 · answered by Terry L 2 · 0⤊ 0⤋
Okay. So, Jackson charges $12 per hour PLUS $360 already. Same thing with Davis. $16 per hour plus an extra $279. Think of it this way. With Jackson, if you do 2 hours, then that'll be $24 because 12 x 2 is 24. Then, add the 360 they charge. That will give you 384. If you do two hours with Davis, it'll be $32 plus 279, which will add up to $311. $311 and $384 are not the same. So, you need to keep multiply every number from 3 up by the amount charged per hour with both Jackson adn Davis until you get the same total. I hope this helps you! :)
2006-09-05 20:07:31 · answer #2 · answered by B K 2 · 0⤊ 0⤋
Well, you have to find out how many times the difference between 12 and 16 will equal the difference between 360 and 279. In this case, it will take 20 hours and 15 minutes:
360-279=81
16-12=4
81/4=20.25
2006-09-05 20:02:35 · answer #3 · answered by Anonymous · 0⤊ 0⤋
360 - 279 = 81
16 - 12 = 4
81 divided by 4 = 20.25
The amounts will be the same after 20 and a quarter hours.
2006-09-05 20:05:28 · answer #4 · answered by Anonymous · 0⤊ 0⤋
If you have a graphing calculator, enter these 2 equations:
Y1 = 360+12X
Y2 = 279+16X
The point where the 2 lines meet is the answer (the X value is your answer in time).
2006-09-05 20:05:12 · answer #5 · answered by ? 1 · 0⤊ 0⤋
Let t be the time when the cost is the same.
Jackson's Cost=Davis's cost
360+12t=279+16t
Solve for t hours.
2006-09-05 20:11:55 · answer #6 · answered by just♪wondering 7 · 0⤊ 0⤋
360 + 12x = 279 + 16x, where x = the amount of time until they're equal
Solve:
81 = 4x
x = 20.25 = 20hr 15min
2006-09-05 20:04:13 · answer #7 · answered by godmike 2 · 1⤊ 0⤋
hours=x
360 +12x=279+16x
81=4x
x=81/4
2006-09-05 20:07:30 · answer #8 · answered by odu83 7 · 0⤊ 0⤋
Dude..You are sooo going to be flipping burgers your whole life you don't know that on your own.
2006-09-05 20:03:19 · answer #9 · answered by Anonymous · 0⤊ 0⤋
after 20.25 hours
2006-09-05 20:12:46 · answer #10 · answered by Pyramider 3 · 0⤊ 0⤋