de47
  • de47
Can someone help me, please?? I'll give medals
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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de47
  • de47
Phineas is the lead research scientist in a lab and responsible for ordering supplies and equipment. The lab is out of petri dishes, so Phineas orders 185 of them. The lab uses 12 petri dishes each day. Explain how you would write a two-variable linear equation for this situation.
skullpatrol
  • skullpatrol
Any ideas?
de47
  • de47
it has to do with stamdard form Ax+By=C

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de47
  • de47
right?
skullpatrol
  • skullpatrol
yes
skullpatrol
  • skullpatrol
But FIRST think about what the question is asking for...
skullpatrol
  • skullpatrol
The lab starts with how many dishes?
de47
  • de47
they want me to model the situation with a function
skullpatrol
  • skullpatrol
we will get to the model later :-)
de47
  • de47
ok, then what the first step?
skullpatrol
  • skullpatrol
The lab starts with how many dishes?
de47
  • de47
185
de47
  • de47
which will end up being the y-intercept right?
skullpatrol
  • skullpatrol
right
skullpatrol
  • skullpatrol
Now from that 185 how many dishes are used per day?
de47
  • de47
12, which is the slope
skullpatrol
  • skullpatrol
Yes, but it is being SUBTRACTED off so it must be a negative slope, right?
de47
  • de47
yes, technically it's -12/1
skullpatrol
  • skullpatrol
Making a sketch may help.
skullpatrol
  • skullpatrol
Try it^ :-)
skullpatrol
  • skullpatrol
|dw:1450130181291:dw|
skullpatrol
  • skullpatrol
|dw:1450130304541:dw|
skullpatrol
  • skullpatrol
$$\Huge y=mx+b$$
de47
  • de47
OK, ya that all makes sense
de47
  • de47
so how would I translate that into standard form equation?
skullpatrol
  • skullpatrol
First put the known numbers into the slope-intercept form please :-)
de47
  • de47
y=-12x+185
de47
  • de47
wait wrong one hold on sorry
de47
  • de47
never mind, I was thinking about point-slope haha
skullpatrol
  • skullpatrol
Add 12x to both sides.
de47
  • de47
12x+y=185
skullpatrol
  • skullpatrol
You are done. :-)
de47
  • de47
Oh, ok thank you!! it seemed like there should have been more to it. Thank you thank you~
skullpatrol
  • skullpatrol
12x + y = 185 has the form ax + by =c.
de47
  • de47
thanks! :)
skullpatrol
  • skullpatrol
Thanks for asking :-)

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