Question

witch method is being used, subtraction or elimination? M=MP3 H=headphones 5x’s the cost of mp3 players + 8x’s the total of a set of headphones that = $840 5m+8h=840 3x’s the total cost of an mp3 + 4x’s the cost of a set of headphones = $480 3m+4h= 480 Equations 5m+8h=840 5m=840-8h M=(1/5)*(840-8h) 3m+4h=480 3*(1/5)*(840-8h) +4h=480 3*(840-8h)+20h=2400 2520-24h+20h=2400 -4h=-120 H=30 M=(1/5)*(840-8h) M=(1/5) *(840-8*(30)) M=(1/5)*(840-240) M=(1/5)*(600) M=120

Answer 1

That's a super long formula...

Answer 2

unless im reading that wrong. HEY. DONT TRIPLE POST

Answer 3

I know and i got the answer I just dont know witch formaula i used, i just did it.

Answer 4

M=MP3 H=headphones



5x’s the cost of mp3 players + 8x’s the total of a set of headphones that = $840

5m+8h=840

3x’s the total cost of an mp3 + 4x’s the cost of a set of headphones = $480

3m+4h= 480

Equations

5m+8h=840

5m=840-8h

M=(1/5)*(840-8h)

3m+4h=480

3*(1/5)*(840-8h) +4h=480

3*(840-8h)+20h=2400

2520-24h+20h=2400

-4h=-120

H=30

M=(1/5)*(840-8h)

M=(1/5) *(840-8*(30))

M=(1/5)*(840-240)

M=(1/5)*(600)

M=120

Answer 5

oh. that's your work.

Answer 6

yes, but idk what elemination is, and i dont wanna say subtract if its also elemination

Answer 7

whta.the.hay.

Answer 8

he showed his work in the question box.

Answer 9

huh

Answer 10

is it elemination or subtraction?!?!?!?!

Answer 11

give me a moment. IT's a bit confusing to read.

Answer 12

sorry, but I can't udnerstand what's going on.

Answer 13

i was going to say substitution, but that must be way off.

Answer 14

hey, you able to describe to me what's happening there?

Answer 15

heres the question that i answered

Answer 16

Translate the following into a system of equations, then solve it:
A customer walks into an electronics store and buys five MP3 players and eight sets of headphones, paying $840. A second customer buys three MP3 players and four sets of headphones, and pays $480. How much does an MP3 player cost? How much does a set of headphones cost?

Answer 17

and i just did it, i dont know what i used I JUST DID THE PROBLEM.



M=MP3 H=headphones



5x’s the cost of mp3 players + 8x’s the total of a set of headphones that = $840

5m+8h=840

3x’s the total cost of an mp3 + 4x’s the cost of a set of headphones = $480

3m+4h= 480

Equations

5m+8h=840

5m=840-8h

M=(1/5)*(840-8h)

3m+4h=480

3*(1/5)*(840-8h) +4h=480

3*(840-8h)+20h=2400

2520-24h+20h=2400

-4h=-120

H=30

M=(1/5)*(840-8h)

M=(1/5) *(840-8*(30))

M=(1/5)*(840-240)

M=(1/5)*(600)

M=120

Answer 18

It looks like substitution.

Answer 19

I agree!

Answer 20

So..I'm actually right, @Chlorophyll ?

Answer 21

Absolutely, I'm tearing out my eyes to find it out finally :(

Answer 22

5m=840-8h
M=(1/5)*(840-8h)

Answer 23

Still don't understand why people go super long way instead of 4 lines ???

Answer 24

@NotTim you're greatly deserved medal for being pioneer of analyzing this "scary" post :)

Answer 25

Thanks. I do what I can to help on Os.

Answer 26

I've never done this kind of math so i go the long way. MY BAD!