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Ray Of Light [21]
3 years ago
9

Find the sum and write it in standard form (6x^3+3x^2+3)+(2x^3−5x+1)

Mathematics
1 answer:
krek1111 [17]3 years ago
3 0

Answer:

8 {x}^{3}  + 3 {x}^{2}  - 5x + 4

Step-by-step explanation:

(6 {x}^{3} + 3 {x}^{2}  + 3) + (2 {x}^{3}   - 5x + 1) \\  = 6 {x}^{3}  + 2 {x}^{3}  + 3 {x}^{2}  - 5x + 3 + 1 \\  = 8 {x}^{3}  + 3 {x}^{2}  - 5x + 4

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2a) Solve using substitution.
Tcecarenko [31]
First things first, write out your equation without the substitution.

2x+ 2y= 10

Now, put in the substitution.

2x+ 2• 2= 10

Combine like terms.

2x+ 4= 10

Now that your equation it simplified, you need to reverse the problem and put everything on the other side.

2x+ 4= 10
- 4 - 4
2x = 6

2x=6
— —
2 2

X= 3

So the final answer is x=3

8 0
2 years ago
If two samples A and B had the same mean and standard deviation, but sample A had a larger sample size, which sample would have
Advocard [28]
<h3>Answer: Sample B as it has the smaller sample (choice #4)</h3>

===========================================================

Explanation:

Recall that the margin of error (MOE) is defined as

MOE = z*s/sqrt(n)

The sample size n is located in the denominator, meaning that as n gets bigger, the MOE gets smaller. The same happens in reverse: as n gets smaller, the MOE gets bigger.

Put another way, a small sample size means we have more error because small samples mean they are less representative of the population at large. The bigger a sample is, the better estimate we will have of the parameter.

We are told that "sample A had a larger sample size" indicating that sample A has a more narrow confidence interval.

Therefore, sample B would have a wider confidence interval.

This is true regardless of what the confidence level is set at.

7 0
3 years ago
What is the Greatest Common Factor of x^4 and x^3?
hammer [34]
Judging by the question I noticed that the two both share x^3 in common. You can divide x^4 by x^3 and get x as a result, and x^3 can still divide into itself.

Thus your answer should be C, x^3
5 0
3 years ago
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klio [65]

Answer:

Step-by-step explanation:

It means that you will a 2 or a 3 or a 4 or a 5 or 6.

All of these are permitted.

So the probability of getting at least a 2 is 5/6.

5 0
3 years ago
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krok68 [10]

Answer:

1 1/3 feet per year

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Steps:

1. How many months per year? 12.

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3. multiply 1/3 and 4.

4. Your answer is 4/3 or 1 1/3 feet per year.

4 0
3 years ago
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