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Verizon [17]
3 years ago
12

The ordered pair below is from an inverse variation. Find the constant of variation. (7,8)

Mathematics
1 answer:
Marysya12 [62]3 years ago
4 0
Inverse variation:  y = k/x.  Here x=7 and y=8.  Thus,

y = k/x becomes 8 = k/7, or k=56.  The const. of var. is 56.
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The length of a rectangle is 5 inches less than 4 times the width. The perimeter is 110 inches. Find the length and the width.
nataly862011 [7]

Answer:

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Step-by-step explanation:

Perimeter of a rectangle = 2 * ( L + W)

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Equation is therefore:

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6 0
3 years ago
Find the equation of the line through point (3,−3) and parallel to y=3x−4. Use a forward slash (i.e. "/") for fractions (e.g. 1/
exis [7]

Answer:

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Step-by-step explanation:

I'm fairly certain this is the answer.

Consider the point (3,-3). In terms of variables this is written (x,y).

Remember that the equation for slope is y = mx + b.

In that equation, "b" is your y-intercept, and "m" is your slope.

If 2 lines are parallel, they have the same slope but different y-intercepts. So you can use the slope from the equation y=3x-4 to find the parallel line. You can also plug in the values 3 and -3 to solve for b, our y-intercept.

If we set up the equation, we have -3 = 3(3) + b.

Now solve for b.

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Combine like terms, so that -12 = b, and you have your y-intercept.

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Therefore, y = 3x - 12

5 0
3 years ago
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