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Goryan [66]
3 years ago
10

I need all I don't know how to do????

Mathematics
1 answer:
Ghella [55]3 years ago
6 0
Need the answers to all the questions?

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I need help with this problem.
sdas [7]

Answer:

  \text{4}\quad -3x^{-1}+x^{-2}

Step-by-step explanation:

The answer choices suggest there is a common factor of (x+2) that can be removed from numerator and denominator.

The denominator factors as ...

  x^3+2x^2=x^2(x+2)

The numerator obviously has no factors of x. We can try any of several means to determine if (x+2) is a factor. I tried synthetic division and found that the numerator can be written as ...

  -3x^2-5x+2=(-3x+1)(x+2)

Then the expression simplifies to ...

  \dfrac{-3x^2-5x+2}{x^3+2x^2}=\dfrac{(-3x+1)(x+2)}{x^2(x+2)}\\\\=\dfrac{-3x+1}{x^2}=\dfrac{-3x}{x^2}+\dfrac{1}{x^2}=-3x^{-1}+x^{-2} \qquad\text{matches choice 4}

4 0
3 years ago
I need to find an easier way to multiply things such as 2 over 7 times -50 anyone know what to do?
chubhunter [2.5K]
2/7 x -50

you take the numerator and times it by the number and you get -100/7 so you just take -100/7 
7 0
3 years ago
Read 2 more answers
Which figure is not completely constructed from polygons?
Ann [662]
The figure that is not completely constructed from polygons is cone because it has a curve and it not considered as polygon since a polygon is a 2 dimensional shape formed only with straight lines. Examples are pentagons, diamonds, and hexagons.
8 0
4 years ago
During a sale, a shirt was marked down from $70 to $56. What was the percent decrease?
KATRIN_1 [288]

-20.00% is the percent decrease

3 0
4 years ago
Read 2 more answers
The area of a triangle that has a base of 7 and a height of 17 is:
Andru [333]

Answer:

59.5

Step-by-step explanation:

First we have to multiply 7 by 17 (7x17).

Then you have to divide it by 2.

1/2 X base x height

8 0
2 years ago
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