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velikii [3]
3 years ago
11

PLLLLLLLLZZZZZZ help will give brainliest

Mathematics
1 answer:
Elodia [21]3 years ago
7 0

Answer:A. 3x^2-2x-1+9x+2x^2-3=5x^2+7x-4

B. 5x^3+4x^2-x-3-5x^2-7x+4=5x^3-x^2-8x+1

C. Polynomials are closed under addition and subtraction...

Step-by-step explanation:

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quezlet: A survey of​ third- to​ twelfth-grade students with a sample size of 2026 found that they devoted an average of 1 hour
Maurinko [17]

Answer:

Population is all students from grades 3-12.

Sample is the students who participated in the survey.

Step-by-step explanation:

Given : A survey of​ third- to​ twelfth-grade students with a sample size of 2026 found that they devoted an average of 1 hour and 46 minutes per day to using entertainment media.

To find : Identify the population and the sample.

Solution :

The population is defined as it contain all individuals which we want to collect the information.

So, the population consists of all third- to twelfth grade students.

Therefore, Population is all students from grades 3-12.

The sample is defined as a part of population of which information was actually collected.

So, the sample is only the respondents in the survey conducted in 2026.

Therefore, Sample is the students who participated in the survey.

6 0
3 years ago
7 2/3 + 9 3/4=<br> Plz help<br> A. 17 1/2<br> B. 16 5/12<br> C. 16 5/7<br> D. 17 5/12
Elis [28]
The answer is D. 17 5/12
4 0
3 years ago
Rewrite each equation in vertex form by completing the square. Then identify the vertex.
Cerrena [4.2K]
ANSWER

Vertex form:

y = ( {x + 4)}^{2} - 11

Vertex

V(-4,-11)

EXPLANATION

The given expression is

y = {x}^{2} + 8x + 5

We complete the square to get the vertex form.

Add and subtract half the square of the coefficient of x.

y = {x}^{2} + 8x + 16 + 5 - 16

y = ( {x + 4)}^{2} - 11

The vertex is

V(-4,-11)
7 0
2 years ago
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Goshia [24]

Answer:

She scored 1200 in all ten games

5 0
2 years ago
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What is the slope of the line shown on the graph?
svet-max [94.6K]

I believe the answer is C -4

Edit . . . I might have been wrong haha thinking backwards

3 0
3 years ago
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