All categories

3 years ago

Add or subtract the polynomials (8x3+3x-2)+(9x2-7+3x-2x3)

Mathematics

2 answers:

crimeas [40]3 years ago

4 0

Answer:

10x^3+9x^2-9

Step-by-step explanation:

8x^3+2x-2+9x^2-7+2x-2x^3 - Combine like terms

10x^3+9x^2-9

LekaFEV [45]3 years ago

3 0

Answer:

$\boxed{\boxed{\sf 6x^3+9x^2+6x-9}}$

Step-by-step explanation:

$\sf \left(8x^3+3x-2\right)+\left(9x^2-7+3x-2x^3\right)$

$\sf 8x^3+3x-2+9x^2-7+3x-2x^3$

Note: If there is a negative sign in front of parentheses, each term within the expression changes sign.

$\Longrightarrow \sf 8x^3+3x-2+9x^2-7+3x-2x^3$

Now, we need to organize expression into groups like terms:

$\Longrightarrow \sf (8x^3, -2x^3)\: (3x, 3x)\:(-2,-7)$

$\longmapsto\sf 8x^3-2x^3=6x^3$

$\longmapsto\sf 3x+3x=6x$

$\longmapsto\sf -2-7=-9$

$\boxed{\sf 6x^3+9x^2+6x-9}$

_____________________________

You might be interested in

Write an explicit formula for then th an. term of the sequence 45, 15,5. ....

7nadin3 [17]

Answer:

The sequence above is a geometric sequence

For an nth in a geometric sequence

$u(n) = a {r}^{n - 1}$

where n is the number of terms

a is the first term

r is the common ratio

From the question

a = 45

r = 15 / 45

The explicit formula for the sequence is

U(n) = 45(1/3)^n-1

Hope this helps you

7 0

3 years ago

Please can someone tell me the defenitions of each of these terms?

Xelga [282]

A fee charged based on the total cost of things you buy. It is collected by the seller and added onto the price of the things bought. It's based on a percent set by the government.
A partial discount or refund given on a purchased item
Taxes paid by employees to federal and state government. Collected or withheld from one's paycheck.
The total amount of an employee's earnings before deductions are taken out (aka Total Pay), and may include overtime pay
The pay you get after taxes and the deductions. You subtract your gross pay by federal tax, social security, etc.

5 0

3 years ago

Please help pleaseee

Nataly_w [17]

Answer:

4 Thank you cards

Step-by-step explanation:

lmk if you need the work on how i got it :)

4 0

3 years ago

Read 2 more answers

elander goes to baseball practice on mondays and thursdays. each practice lasts 2.15 hours. how many hours of baseball practice

RoseWind [281]

Answer:

12.9 hours.

Step-by-step explanation:

First, do 2.15 hours multiplied by 2, for each day. Then, multiply 4.30 by the 3 for 3 weeks.

3 0

3 years ago

5. Put the following fractions in order from smallest to largest: 1/4, 2/3, 4/7, 1/2

AVprozaik [17]

Answer:

4/7, 1/4,1/2, 2/3

Step-by-step explanation:

7 0

3 years ago