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mars1129 [50]
2 years ago
10

Solve: -25 < x + 20 < 25

Mathematics
1 answer:
denis23 [38]2 years ago
8 0

Answer:

-45 < x < 5 (see graph below)

Step-by-step explanation:

to isolate x by itself, subtract 20 from all three terms of the equation:

(-25-20)

once you finish subtracting 20, x should be by itself, making the equation graphable:

-45 < x < 5

since x is not equal to -45 or 25, the graph line endings have open circles.

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Step-by-step explanation:

To find k, use the equation

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dsp73

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3 years ago
If 0 = 6n -36 what is the value of n -5
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3 years ago
Factorise the following using the Difference of Two Squares or Perfect Squares rule: a) (2x-2)^2 - (x+4)^2 b) (3x+4) (3x-4)
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Answer:

Step-by-step explanation:

Hello, please consider the following.

a)

(2x-2)^2 - (x+4)^2 \\\\=(2x-2-(x+4))(2x-2+x+4)\\\\=(2x-2-x-4)(3x+2)\\\\=\boxed{(x-6)(3x+2)}

b)

(3x+4) (3x-4)\\\\=(3x)^2-4^2\\\\=\boxed{9x^2-16}

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