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2 years ago

(6x^3+18x^2)-3x^2please help me!

Mathematics

2 answers:

Ratling [72]2 years ago

8 0

First, we have to open up the parentheses:

6x^3 + 18x^2 - 3x^2

6x^3 + 15x^2

There's not much else we can do other than factor, but it doesn't seem like factoring is necessary.

GrogVix [38]2 years ago

6 0

Simplify. Combine like terms.

6x^3 + (18x^2 - 3x^2)

6x^3 + 15x^2 is your answer

hope this helps

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katrin2010 [14]

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2 years ago

Im very young and need help whats 2+2

Fynjy0 [20]

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3 years ago

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Lunna [17]

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3 years ago

Which values for x make this inequality true?<br><br> −15x+4≤39

nadezda [96]

Answer:

x ≥ -7/3

Step-by-step explanation:

<h3>General Formulas and Concepts:</h3>

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<h3>Order of Operations: BPEMDAS</h3>

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Step-by-step explanation:

Step 1: Define Inequality

-15x + 4 ≤ 39

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Subtract 4 on both sides: -15x ≤ 35

Divide -15 on both sides: x ≥ -7/3

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8 0

2 years ago

A solar collector is 2,0 m long by 1,5 m wide. It is held in place

icang [17]

Answer:

The width of the frame is 0.0746 meters

Step-by-step explanation:

We are told that after the frame has been attached to the solar collector, the area that is left exposed is $2.5m^2$ . As we see in the figure, the dimensions of this area are

$(w-2x)$ and $(l-2x)$

where $x$ is the width of the frame.

The product of these dimensions must equal the exposed area:

$(w-2x)(l-2x)=2.5m^2$

Now since $w=1.5m$ and $l=2m$ we have:

$(1.5-2x)(2-2x)=2.5$

we expand this and solve for x using the quadratic formula:

$4x^2-7x+3=2.5$

$4x^2-7x+0.5=0$

we get two solutions:

$x=1.6753$

$x=0.0746$

We take the second solution i.e $x=0.0746$ , because first one gives a width larger than the dimensions of the solar collector which cannot be possible.

Thus the width of the frame is 0.0746 meters.

7 0

3 years ago