All categories

3 years ago

(a3 - 2a + 5) - (4a3 - 5a2 + a - 2)

Mathematics

2 answers:

djverab [1.8K]3 years ago

7 0

Answer:

5 * a^3 - 5 * a^2.

Step-by-step explanation:

is it wrong??

prisoha [69]3 years ago

6 0

Answer:

-3a^3+5a^2-3a+7

Step-by-step explanation:

You might be interested in

in the table are shown the number of hours. Wendy works an amount of pay she receives. Dose this table show direct variation? if

ankoles [38]

Yes, it does because all of those can be multiplied by 9. So, H*9=P. And It means for every hour of work she gets paid 9 dollars. Or 9 dollars an hour.

5 0

3 years ago

Will mark brainliest with ONE question!!^^^^^^^^

Blababa [14]

Answer:

c + 0.5b =700 and c + b =1,000 I think

7 0

3 years ago

Read 2 more answers

Your friend Alex was solving the equation 2x^2+3x=20 and the work below. Tragically, she made an error in her work. First, expla

earnstyle [38]

Answer:

Her error is that For solving by Completing the square method.

She has not made the Coefficient of x² as 1.

Therefore,

$x=\dfrac{-3+13}{4}=\dfrac{10}{4}=2.5\ OR\ x=\dfrac{-3-13}{4}=\dfrac{-16}{4}=-4$

Step-by-step explanation:

Alex was solving the equation

$2x^{2}+3x=20$

She is solving for x by Completing the square method

Her error is that For solving by Completing the square method

First step is to make Coefficient of x² as 1 ( one )

She has not made the Coefficient of x² as 1

The Require steps for the equation by Completing the square method are

Step 1 : Given

$2x^{2}+3x-20=0$

Step 2: Divide the whole by 2 we get

$x^{2}+\dfrac{3}{2}x-10=0$

Step 3 : Add 10 to both side

$x^{2}+\dfrac{3}{2}x-10+10=0+10\\\\x^{2}+\dfrac{3}{2}x=10$

Step 4 : Add $(\dfrac{1}{2}coefficient\ of\ x)^{2}=\dfrac{9}{16}$ to both the side.

$x^{2}+\dfrac{3}{2}x+\dfrac{9}{16}=10+\dfrac{9}{16}\\\\x^{2}+2\times \dfrac{3}{4}x+(\dfrac{3}{4})^{2}=\dfrac{169}{16}$

Step 5 : We have A² + 2AB + B² = (A+B)²

$(x+\dfrac{3}{4})^{2}=\dfrac{169}{16}$

Step 6 : Taking Square root

$(x+\dfrac{3}{4})=\pm \sqrt{\dfrac{169}{16}}=\pm \dfrac{13}{4}$

Step 7 : Subtract $\dfrac{3}{4}$ both side

$x+\dfrac{3}{4}-\dfrac{3}{4}=-\dfrac{3}{4}\pm \sqrt{\dfrac{169}{16}}=\pm \dfrac{13}{4}\\\\x=-\dfrac{3}{4} \pm \dfrac{13}{4}$

Step 8 : Finally we get

$x=\dfrac{-3+13}{4}=\dfrac{10}{4}=2.5\ OR\ x=\dfrac{-3-13}{4}=\dfrac{-16}{4}=-4$

Therefore,

$x=\dfrac{-3+13}{4}=\dfrac{10}{4}=2.5\ OR\ x=\dfrac{-3-13}{4}=\dfrac{-16}{4}=-4$

5 0

3 years ago

The machine must be emptied to be serviced. If there are 15 bottles in the machine, what number represents the change in the num

aivan3 [116]

I think the answer is A. 0

8 0

3 years ago

<img src="https://tex.z-dn.net/?f=1%2C%5Cfrac%7B1%7D%7B8%7D%2C%5Cfrac%7B1%7D%7B27%7D%2C%5Cfrac%7B1%7D%7B64%7D%2C...%2C%5Cfrac%7B

Alex

Answer: option C) 343

Justification:

The sequence of the denominators is:

term         denominator

1               1 = 1^3
2               8 = 2^3
3               27 = 3^3
4               64 = 4^3

5               5^3 = 125
6               6^3 = 216
7               7^3 = 343

And that is the term searched. So, the answer is the option C) 343.

5 0

3 years ago

(a3 - 2a + 5) - (4a3 - 5a2 + a - 2)​

(a3 - 2a + 5) - (4a3 - 5a2 + a - 2)