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Basile [38]
3 years ago
5

If y varies directly as x, what is the value of y in these ordered pairs? (8, 4) and (4, y)

Mathematics
1 answer:
soldi70 [24.7K]3 years ago
6 0
So if we see the first one (8,4) x=8 and y=4

And we see the 2nd one (4,y)  x=4 and y=?

We notice that the value of x its been halved. So y varies with x so y value also has to be halved so y= 2
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To find the x-intercept you must make y=0

3x+2y=12 - substitute 0 for y
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x=4

To find the y-intercept you must make x=0

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4 0
3 years ago
Given the vectors w = <-5, 3> and z = <1, 4>, find the results of the vector subtractions. -w − z = z − w = w − z =
Elodia [21]

Answer:

Concept: Linear Algebra

  1. Given two linearly independent vectors w and z
  2. We want -w-z
  3. Hence apply a negative gradient to w
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Step-by-step explanation:

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