Question

i have a word problem on systems of equations that i am completely lost on. my teacher says i have the right setup, i just need to eliminate a variable, which i know how to do, but im stuck on this question. HELP!!!!!!!!! Will MEDAL AND FAN
will post question once i have help


Molly's Custom Kitchen Supplies sells homemade forks and spoons. It costs the store $1.70 to buy the supplies to make a fork and $1.30 to buy the supplies to make a spoon. The store sells forks for $5.60 and spoons for 5.40. Last April Molly's Custom Kitchen Supplies spent $37.90 on materials for forks and spoons. They sold the finished products for a total of $147.20. How many forks and how many spoons did they make last April?

Answer 1

ok :)

Answer 2

kay :)

Answer 3

yea m jst helpin some other ppl too :) i'll come back as soon as i get notification :)

Answer 4

(:

Answer 5

mmk. what i have so far is this:

1.70f + 1.30s = $37.90
5.60f + 5.40 = 147.20

my teacher says this is correct, i just need to evaluate now, and im stuck @imqwerty

Answer 6

@imqwerty

Answer 7

k im back

Answer 8

ok there is a typo that shuld be 5.40s

Answer 9

yeaa sorry i was in a rush but yea thats wat its supposed to say

Answer 10

np :)

Answer 11

1.70f + 1.30s = $37.90
1.7f=37.9-1.3s
f=(37.9-1.3s)/1.7

substitute this value of f in the second equation and u'll get the value of s
then put the value of s in any of these equations to get the value of f

Answer 12

idunderstand @imqwerty

Answer 13

did u get how we took out the value of f in terms of s ?

Answer 14

no do u know algebra nation?

Answer 15

no

Answer 16

whelp...we use the elimination method, elimination multiple, and the substitution method to solve this. we havent learned that way

Answer 17

ok lets do it that way

Answer 18

YAY!

Answer 19

do u know how?

Answer 20

?

Answer 21

1.70f + 1.30s = $37.90
multiply this equation by 5.6/1.7

u get-

(5.6/1.7)1.7f+(5.6/1.7)1.3s=(5.6/1.7)37.9
5.6f+(5.6/1.7)1.3s=(5.6/1.7)37.9

now subtract this equation from the second equation to eliminate 5.6f :)
and then u'll be left with an equation with s.. can u solve it now?

Answer 22

?

Answer 23

imust seem really stupid, i know how to do this, just not for this problem sorry

Answer 24

don wrry :)

Answer 25

can u still help me?

Answer 26

yea ofc

Answer 27

kay thx

Answer 28

so we have this- 5.6f+(5.6/1.7)1.3s=(5.6/1.7)37.9 equation1

and we got another equation-5.60f + 5.40s = 147.20 equation 2

subtracting equation 1 frm 2
u get-

5.60f + 5.40s - [5.6f+(5.6/1.7)1.3s] =147.20 -(5.6/1.7)37.9


5.60f + 5.40s - 5.6f - (5.6/1.7)1.3s = 147.20 -(5.6/1.7)37.9

5.4s-(5.6/1.7)1.3s =147.2 -(5.6/1.7)37.9

can u solve this equation to get s

if ur stuck then don hesitate to ask :P :)

Answer 29

why are u dividing?

Answer 30

u mean that 5.6/1.7?

Answer 31

yea

Answer 32

well we wanted to finish off the 5.6 f in the second equation by we had a 1.7f in the 1st equation so to make it 5.6f we multiplied the whole equation by 5.6/1.7 :)

Answer 33

i dont understand

Answer 34

watch this- https://www.khanacademy.org/math/algebra-basics/core-algebra-systems/core-algebra-systems-tutorial/v/solving-systems-of-equations-by-elimination

Answer 35

i dont hae time, i got a TON of hw

Answer 36

i guess ill just leave it blank, i have no idea what ur saying

Answer 37

@Hero