anonymous
  • anonymous
Pre-Cal question
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
@welshfella
anonymous
  • anonymous
I don't understand :(
ganeshie8
  • ganeshie8
`Rachel can make 3 bracelets in an hour.` so can you tell how many bracelets she makes in 2 hours ?

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More answers

anonymous
  • anonymous
6
ganeshie8
  • ganeshie8
good, one more question how many bracelets she makes in 10 hours ?
anonymous
  • anonymous
30
ganeshie8
  • ganeshie8
Excellent! how about this how many bracelets she makes in "x" hours ?
anonymous
  • anonymous
Hmm..I dont know about that one
ganeshie8
  • ganeshie8
simply multiply "x" by 3
anonymous
  • anonymous
so 3x?
ganeshie8
  • ganeshie8
thats it! Rachel's function for number of bracelets made in "x" hours is \[y = 3x\]
ganeshie8
  • ganeshie8
notice that if you plugin x=2, you do get y = 3*2 = 6 as expected
ganeshie8
  • ganeshie8
similarly we need to setup an equation for Oliver based on given info
anonymous
  • anonymous
Ah! Ok I see
ganeshie8
  • ganeshie8
`Oliver can make only 2 bracelets in an hour, but he already has 5 completed bracelets` can you tell me how many bracelets Oliver will be having after 2 hours ?
anonymous
  • anonymous
10
ganeshie8
  • ganeshie8
how ?
ganeshie8
  • ganeshie8
he can only make 2 bracelets per hour right
anonymous
  • anonymous
yes
ganeshie8
  • ganeshie8
so how did u get 10
anonymous
  • anonymous
2 times 5
ganeshie8
  • ganeshie8
where did u get 5 from
ganeshie8
  • ganeshie8
try again
ganeshie8
  • ganeshie8
`Oliver can make only 2 bracelets in an hour, but he already has 5 completed bracelets` can you tell me how many bracelets Oliver will be having after 2 hours ?
anonymous
  • anonymous
4
anonymous
  • anonymous
@ganeshie8
anonymous
  • anonymous
@paki
ganeshie8
  • ganeshie8
yes he can make 4 bracelets in 2 hours but he already has 5 to start with, so in total he will be having 4 + 5 = 9, yes ?
anonymous
  • anonymous
yes
ganeshie8
  • ganeshie8
how many bracelets will he be having in 10 hours ?
anonymous
  • anonymous
um..20?
ganeshie8
  • ganeshie8
20, and add the starting 5 to get 25
ganeshie8
  • ganeshie8
so how many bracelets will he be having in "x" hours ?
anonymous
  • anonymous
25x
anonymous
  • anonymous
@ganeshie8 Please get to the point, I have to go soon
ganeshie8
  • ganeshie8
we're very much on the point
ganeshie8
  • ganeshie8
25x is wrong, try again
anonymous
  • anonymous
20x
ganeshie8
  • ganeshie8
plugin x = 2 20*2 = 40 does he really make 40 bracelets in 2 hours ?
anonymous
  • anonymous
no
anonymous
  • anonymous
5x
ganeshie8
  • ganeshie8
no try again, you're close
anonymous
  • anonymous
4x
anonymous
  • anonymous
Lol I give up
ganeshie8
  • ganeshie8
Alright! stop guessing
anonymous
  • anonymous
Will do
ganeshie8
  • ganeshie8
`Oliver can make only 2 bracelets in an hour`, 2 bracelets per hour, so the function will be \(y = 2x\) `but he already has 5 completed bracelets` adding this the overall function for Oliver is \[y=2x+5\]
ganeshie8
  • ganeshie8
so the system of equations is \[y = 3x\\y=2x+5\]
anonymous
  • anonymous
Oh! Lol NOW I get it
ganeshie8
  • ganeshie8
Good :) Rachel needs to solve this system to find the time at which her bracelets equal Oliver's
ganeshie8
  • ganeshie8
do you know how to solve it ?
anonymous
  • anonymous
Should we actually solve it?
anonymous
  • anonymous
graphing
ganeshie8
  • ganeshie8
better solve it
ganeshie8
  • ganeshie8
solving is easy \[y = 3x\\y=2x+5\] since the left hand sides are same, the right hand sides also must be same : \[3x = 2x+5\] solve \(x\), can you ?
anonymous
  • anonymous
x=5
ganeshie8
  • ganeshie8
Excellent! so after 5 hours both Rachel and Oliver will be having same number of bracelets
anonymous
  • anonymous
yay! I love you ganeshie8!
anonymous
  • anonymous
wanna answer another? I have the answer, I just need to check
ganeshie8
  • ganeshie8
wil try, please close this and open a new post

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