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dsp73
3 years ago
7

What is the slope of the line that contains the points (5, 5) and (8, 3)?

Mathematics
1 answer:
alexgriva [62]3 years ago
5 0

Slope = (Y2 - Y1) / (X2 - X1)

Slope = (5 - 3) / (5 - 8) = 2/-3 = -2/3

Answer: (B) -2/3

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In what table does y vary directly with x?
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An organism measures 2.9 x 10-5 centimeters in diameter. What is this number in standard notation?
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3 years ago
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3 years ago
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The length of a rectangular floor is 4 feet longer than its width w. The area of the floor is 525 ft^2.
andre [41]

Answer:

  • 525 = (w+4)(w)
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Step-by-step explanation:

Let w represent the width of the floor. Then the length of the floor is (w+4) and its area is ...

  A = LW

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Solutions are ...

  w = 21, w = -25

We are interested in the positive solution: w = 21.

The floor is 21 feet wide and 25 feet long.

_____

<em>Alternate solution</em>

Sometimes, when the factors aren't obvious, it works well to write an equation for the average of the dimensions. Here, we can represent that with x, and use (x-2) for the width, and (x+2) for the length. Then we have ...

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  √529 = 23 = x

Then w=23 -2 = 21, and the length is w+4 = 25.

7 0
3 years ago
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