Factorise x² + 4x + 3.I understand everything perfectly until I have to split the two sections, add up and pull out the common factors:

x² + 3x: common factor is x
1x + 3: common factor is 1

From here I do not understand how you get to the answer which I do know is (x + 1) • (x + 3).

None of the explanations out there give detail to this step. I don’t understand how adding those two groups up (while pulling out common factors) will give you (x + 1) • (x + 3)!

I would hugely appreciate any help on this! Thank you :)

Answers

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The inner and outer Radii of a cylindrical pipe are 5 cm and 4 cm respectively. find the area of cross section of the pipe.

Answers

To do this find the area of the inner pipe, and then find the area of the outer pipe, then subtract the larger of the two from the smaller, and that is the area of the cross section

Answer:

28.3 cm²

Step-by-step explanation:

You find the area of the whole section which is 5²π = 25π.

Then you find the area of the empty part which is 4²π = 16π.

Then you subtract to get 9π which is 28.27433388......

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Solve this question? -7x-18=3

Answers

-7x - 18 = 3
-7x = 21
x= -3

the answer to the equation is 3

Whats the work for 0>3x-3-6

Answers

Hi Scotti

0>3x-3-6

0>3x-9

Now flip

3x-9<0

We need to add 9 to both sides

3x-9+9<0+9

3x<9

Divide both sides by 3 so we can find the value for x

3x/3<9/3

x<3

I hope that's help :)

Algebra question ( Matrices and Determinants ) 20 pints

Answers

The correct answer is option D
D. 597
The solution is as following
Determinant of K = 14 *(8*5+ --1*-2) - (-13)*(3*5- (-1)*(-10)) + 0 *( 3*-2 - 8*-10)
            = 14 * 38 + 13 * 5 + 0 * 74
            = 532 + 65
           = 597

Is 41 prime, composite, or neither?

prime
composite
neither

Answers

41 cannot be a divisible by any number except 1. Therefore, it is PRIME.

Answer:

it is divisible only by 1 and itself

Step-by-step explanation:

therefore, it is prime

Geometry question, any help is appreciated

Answers

I would say a scatter plot.

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