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3 years ago

12x + 4(-2x + 3) - 10

Mathematics

1 answer:

Molodets [167]3 years ago

4 0

Answer:

2⋅(2x+1)

Step-by-step explanation:

(12x + 4 • (3 - 2x)) - 10

Pull out like factors :

4x + 2 = 2 • (2x + 1)

Final result :

2 • (2x + 1)

Hope this can help you

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Step-by-step explanation:

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3 years ago

1. Bob tried to answer the following question by finding the missing angle and rounding the answer to the nearest degree.

iren2701 [21]

Answer:

Part 1)

Bob's mistake was to have used the cosine instead of the sine

The measure of the missing angle is $53.13\°$

Part 2) The surface area of the pyramid is $288\ cm^{2}$

Step-by-step explanation:

Part 1)

Let

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we know that

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Bob's mistake was to have used the cosine instead of the sine

Part 2) we know that

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$SA=b^{2}+4[\frac{1}{2}(b)(h)]$

where

b is the length side of the square

h is the height of the triangular lateral face

In this problem

$h=b/2$ -------> by an 45° angle

$b=2h$

$sin(45\°)=\frac{h}{6\sqrt{2}}$

$h=6\sqrt{2}(sin(45\°))=6\ cm$

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Y_Kistochka [10]

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((t+3)/(t+4))*(1/(t^2+7t+12))
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