anonymous
  • anonymous
please help! fan and medal
Mathematics
chestercat
  • chestercat
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anonymous
  • anonymous
Let u = <5, 6>, v = <-2, -6>. Find -2u + 5v. (1 point) <-20, -42> <-20, 0> <0, 18> <-6, 0>
sdfgsdfgs
  • sdfgsdfgs
to evaluate the range for -2u+5v, you simply substitute the ranges for u and v in the eqn...
sdfgsdfgs
  • sdfgsdfgs
in this case u <5,6> and v <-2,-6>

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anonymous
  • anonymous
I have no idea...
anonymous
  • anonymous
sdfgsdfgs
  • sdfgsdfgs
the expression is -2u+5v ok? u is in between 5 and 6 and v is between -2 and -6 so far so good?
anonymous
  • anonymous
yes
anonymous
  • anonymous
sdfgsdfgs
  • sdfgsdfgs
to find the range, we need to find the smallest and largest possible value for -2u+5v
anonymous
  • anonymous
okay!
sdfgsdfgs
  • sdfgsdfgs
u is in between 5 and 6; which will give the smallest -2u and will give the largest -2u?
anonymous
  • anonymous
5
anonymous
  • anonymous
ganeshie8
  • ganeshie8
I think u and v are vectors here
Plasmataco
  • Plasmataco
Wait. I think I got is. Dilate coordinates u by -2 so that would be (10,12). Dilate v by 5 so that would be (-10,-30). now add so you get (0,-18)
anonymous
  • anonymous
@Plasmataco, you have the right idea but you have sign error

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