anonymous
  • anonymous
The equation 9(u – 2) + 1.5u = 8.25 models the total miles Michael traveled one afternoon while sledding, where u equals the number of hours walking up a hill and (u – 2) equals the number of hours sledding down the hill. Which is the value of u?
Mathematics
jamiebookeater
  • jamiebookeater
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mattyboyy
  • mattyboyy
Looks like distribution but im not sure? @iambatman
mattyboyy
  • mattyboyy
cant be lol nvm
anonymous
  • anonymous
A: u = 0.25 B: u = 0.75 C: u = 1.1 D: u = 2.5

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mattyboyy
  • mattyboyy
anonymous
  • anonymous
Here are some options to help you out... And I'm pretty sure.
mattyboyy
  • mattyboyy
Okay well if it is... hold on I can do it but...
anonymous
  • anonymous
Okay I appreciate it...
mattyboyy
  • mattyboyy
|dw:1435012772189:dw| drawing sucks lol but lets do it
mattyboyy
  • mattyboyy
|dw:1435012852710:dw| Distribute the 9 first
anonymous
  • anonymous
Okay I'm doing this on paper... next?
mattyboyy
  • mattyboyy
what did you get? lol
mattyboyy
  • mattyboyy
anyways lmao
anonymous
  • anonymous
Actually I think I just solved the whole thing lol, I came up with u equals 0.25?
mattyboyy
  • mattyboyy
|dw:1435013034777:dw| that what you should have. You just multiple the 9 across the perenthesis
mattyboyy
  • mattyboyy
lol lets see idk yet either
mattyboyy
  • mattyboyy
add common numbers so 9u + 1.5u = 10.5u
anonymous
  • anonymous
And now solve for u?
mattyboyy
  • mattyboyy
actual subtract 1.5u from 9u
mattyboyy
  • mattyboyy
so it would be 7.5u
mattyboyy
  • mattyboyy
so the equation now should be 7.5u +18 = 8.25
mattyboyy
  • mattyboyy
now subtract 18 from 8.25
anonymous
  • anonymous
Okay I have that so far.. Okay
anonymous
  • anonymous
9.75
mattyboyy
  • mattyboyy
actual I think we messed up
mattyboyy
  • mattyboyy
we need to add 1.5 to 9 I believe so that gives us 10.5
anonymous
  • anonymous
Yeah because it was a plus sign right?
anonymous
  • anonymous
10.5
mattyboyy
  • mattyboyy
I'm doing it wrong...
mattyboyy
  • mattyboyy
anonymous
  • anonymous
\[9 (u-2)+1.5 u=8.25\text{ },\text{ }u=2.5 \]
anonymous
  • anonymous
Alright, that does the job lol. Thanks very much robtobey, appreciate it.
anonymous
  • anonymous
Your welcome.

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