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ICE Princess25 [194]
3 years ago
6

What are two different ways of factoring –3x – 9? Select all that apply. A. –3(x + 3) B. 3(x + 3) C. 3(–x – 3) D. –3(x – 3)

Mathematics
1 answer:
Shalnov [3]3 years ago
3 0
A. and C. Are both correct
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Two skaters are practicing at the same time on the same rink. A coordinate grid is superimposed on the ice. One skater follows t
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Answer:

The skaters will collide at the points;

(2,28) and (4,24)

Step-by-step explanation:

The points they might collide will be the points when both y are equal;

-2x + 32 = -2x^2 + 18x

2x^2 -18x -2x + 32 = 0

2x^2 -20x + 32 = 0

2x^2 - 16x - 4x + 32 = 0

2x(x -8) -4( x -8) = 0

(2x -4)(x -8) = 0

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hence; x = 2 or 8

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at x = 2, just substitute into any of the 2

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y = -2(2) + 32

y = -4 + 32 = 28

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The points that they will collide are;

(2,28) and (4,24)

4 0
3 years ago
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