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Mamont248 [21]
3 years ago
9

Add the polynomias:(8x^2-5x+7)+(7x^3-3x)​

Mathematics
2 answers:
mezya [45]3 years ago
3 0

Answer:

7x^{3} + 8x^{2} -8x + 7

Step-by-step explanation:

(8x^{2} - 5x + 7) + (7x^{3}  - 3x) = 8x^{2} - 5x + 7 + 7x^{3}  - 3x = 7x^{3} + 8x^{2} - 5x  - 3x + 7 =  7x^{3} + 8x^{2} -8x + 7

xxMikexx [17]3 years ago
3 0

Answer:

7x³ + 8x² -8x + 7

Step-by-step explanation:

8x² - 5x +7 + 7x³ - 3x

7x³ + 8x² + (-5x -3x ) + 7

7x³ + 8x² -8x + 7

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Could someone please help with this question
bonufazy [111]
The answer is 7 cause first you multiple 8*35=280 then you dive it by 40 which is
7
6 0
3 years ago
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What is 2X to the power of 3 divided by -8X to the power of 4?
PIT_PIT [208]

Answer: 8 = 23 (-8)4 = (23)4 = 212

1/(2048x)

Step-by-step explanation:Negative number raised to an even power is positive

For example let's look at (-7)6 , where (-7) , a negative number, is raised to 6 , an even exponent :

(-7)6 can be written as (-7)•(-7)•(-7)•(-7)•(-7)•(-7)

Now, using the rule that says minus times minus is plus, (-7)6 can be written as (49)•(49)•(49) which in turn can be written as (7)•(7)•(7)•(7)•(7)•(7) or 76 which is positive.

We proved that (-7)6 is equal to (7)6 which is a positive number

Using the same arguments as above, replacing (-7) by any negative number, and replacing the exponent 6 by any even exponent, we proved which had to be proved

Dividing exponential expressions :  x3 divided by x4 = x(3 - 4) = x(-1) = 1/x1 = 1/x

Final result :

1/2048x

im in middle school

6 0
3 years ago
After MM students took a test, there was a total of 64% of correct answers. If the test contains 50 questions, what is the least
Blizzard [7]

Answer:

3 Questions

Step-by-step explanation:

After MM students took a test, there was a total of 64% of correct answers.

The tests contained a total of 50 questions.

Number of questions gotten to score 64%= 64% X 50 = 32 questions

If the next student wants to score 70%, he has to score

70% of the total score = 70% X 50 = 35

Therefore the least number of question more the student has to get right

=35-32

= 3 questions

7 0
3 years ago
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What is the value of x in the equation?
mojhsa [17]
The answer is D, 1 3/5
6 0
2 years ago
What are two expressions where the solution is 41
Elanso [62]
40+1
50-9
4(10)+1
410/10

There are a lot of answers

4 0
3 years ago
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