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Nuetrik [128]
3 years ago
9

So confused! I have the answer, but can't understand the explanation. Please help...

Mathematics
2 answers:
andrey2020 [161]3 years ago
6 0
(mx^3+3)*(2x^2+5x+2)-(8x^5+20x^4)=8x^3+6x^2+15x+6 \\ (mx^3*2x^2)+(mx^3*5x)+(mx^3*2)+(3*2x^2)+(3*5x)+(3*2) \\ -8x^5-20x^4=8x^3+6x^2+15x+6\\ \\ 2mx^5+5mx^4+2mx^3+6x^2+15x+6-8x^5-20x^4 \\ =8x^3+6x^2+15x+6 \\ \\ (2m-8) x^{5} +(5m-20) x^{4} +2mx^3+6x^2+15x+6 \\ =8x^3+6x^2+15x+6 \\ \\ (2m-8) x^{5} +(5m-20) x^{4} +(2m-8)x^3=0 \\ (m-4) 2x^{5} +(m-4) 5x^{4} +(m-4)2 x^3=0 \\ (m-4)( 2x^{5} + 5x^{4} +2 x^3)=0 \\ m=4

MatroZZZ [7]3 years ago
6 0
(mx³ + 3)(2x² + 5x + 2) - (8x⁵ + 20x⁴) = 8x³ + 6x² + 15x + 6
(mx³(2x² + 5x + 2) + 3(2x² + 5x + 2)) - (8x⁵ + 20x⁴) = 8x³ + 6x² + 15x + 6
(mx³(2x²) + mx³(5x) + mx³(2) + 3(2x²) + 3(5x) + 3(2)) - (8x⁵ + 20x⁴) = 8x³ + 6x² + 15x + 6
(2mx⁵ + 5mx⁴ + 2mx³ + 6x² + 15x + 6) - (8x⁵ + 20x⁴) = 8x³ + 6x² + 15x + 6
(2mx⁵ + 5mx⁴ + 2mx³ + 6x² + 15x + 6) - 8x⁵ - 20x⁴ = 8x³ + 6x² + 15x + 6                                           <u>                                      - 6x²  - 15x  - 6                         - 6x²  - 15x  - 6</u>
                    (2m(x⁵) + 5m(x⁴) + 2m(x³)) - 8x⁵ - 20x⁴ = 8x³
                                (2x⁵ + 5x⁴ + 2x³)m - 8x⁵ - 20x⁴ = 8x³
                               10x⁵ - 15x⁴)m = 8x
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436, 455, 280, 220, 353, 387, 119, 297, 241, 460, 393, 121, 146
Murrr4er [49]
First you would have to put the data in order.
119, 121, 146, 220, 241, 280, 297, 353, 387, 393, 436, 455, 460
To find the mean, you add up all the numbers and then divide by how many there are.
3908/13=300.6 (this is rounded to the nearest tenth)
To find the median, you have to look at the middle number
The median here is 297
To find the first quartile, you have to half the data set through the middle and find the middle number on the left
The first quartile is 220
Do the same thing for the third quartile, but look at the right data set
The third quartile is 393

Hope this helps!
4 0
4 years ago
What does this mean?<br> "9!"<br> I did not learn this yet.
Serhud [2]

Answer: 9 means "Parent watching"

hope this helps

6 0
3 years ago
If an office is 120 sq ft, what is the measurement in square meters?
monitta
There are about 3.3 feet in a meter.

120 sq feet converted to meters is 36.576 square meters
3 0
3 years ago
PLz help 5 stars correct answer
mariarad [96]
0.9 would be the best guess i belive
8 0
3 years ago
If you have 24 square pieces of wood, describe all the different ways you could make a rectangle by placing them side by side
Ronch [10]

 

You have 24 square pieces of wood. You could lay them out in the following fashion. First number is the number of rows. Second number is the number of columns. For example:

1,24 is 1 row by 24 columns. Here goes:

1,24

2,12

3,8

4,6

6,4

8,3

12,2

24,1

i believe that's all.

<span>It winds up being the number of ways you can multiply two integers to get 24. </span>

7 0
3 years ago
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