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BARSIC [14]
3 years ago
11

Factoreach expression. 8x 3 + 28x 2 + 40x

Mathematics
1 answer:
Sindrei [870]3 years ago
5 0

Hello :)

First, find the common factor of all of the terms.

<h2>8x^3</h2>

4 ⋅ 2 = 8

x ⋅ x ⋅ x = x^{3}

<h2>28x^2</h2>

4 ⋅ 7 = 28

x ⋅ x= x^{2}

<h2>40x</h2>

4 ⋅ 10 = 40

x = x

the common factor of all of the terms is 4x.

Next, divide the original equation by 4x.

4x(8x^{3} +28x^{2}+40x)

\frac{8x^{2} }{4x}+\frac{28x^2}{4x}+\frac{40x}{4x}

4x(2x^2+7x+10)

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Answer:

F. None of the above

Step-by-step explanation:

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4 years ago
Which value if x makes this proportional true? 14/20=56/x A.x=62 B.x=70 C.x=80 D.x=100​
Leya [2.2K]
<h3>Answer:  C) x = 80</h3>

==================================================

Work Shown:

Let's cross multiply to get the following

14/20 = 56/x

14*x = 20*56

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x = 1120/14

x = 80

-------------------

As a way to check the answer, we can type 14/20 - 56/80 into the calculator and we should get 0. I'm taking advantage of the rule that if A = B, then A-B = 0. This trick is handy to check if two sides of any equation are equal to one another.

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If y=kx, where k is a constant, and y=24 when x=6, what is the value of y when x=5?A. 6B. 15C. 20D. 23
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We can do this by sybstituting y=24, x=6 in;

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