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Klio2033 [76]
3 years ago
13

Write the polynomial in standard form. Then name the polynomial based on its degree and number of terms. 3x + 2x2 – 6

Mathematics
1 answer:
nekit [7.7K]3 years ago
5 0

So writing a polynomial in standard form is just combining all like terms and then rearranging those terms in descending order of degree. In this case, the term with the highest degree is 2x^2, then 3x, then -6, so our standard form polynomial is 2x^2+3x-6

Next, since there are three terms in this polynomial, this would be classified as a trinomial (tri = 3). Now to find the degree of this polynomial, just take the total number of exponents from the highest term, which in this case its 2x^2 with a total of 2. Putting it all together, this polynomial is a 2nd degree trinomial.

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C) (x,y) -> (-x,-y)

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What is 312/17 in simplest form.
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3 years ago
In Pennsylvania the average IQ score is 101.5. The variable is normally distributed, and the population standard deviation is 15
blsea [12.9K]

Answer:

We conclude that the Pennsylvania school district have an IQ higher than the average of 101.5

Step-by-step explanation:

We are given the following in the question:

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Sample mean, \bar{x} = 106.4

Sample size, n = 30

Alpha, α = 0.05

Population standard deviation, σ = 15

First, we design the null and the alternate hypothesis

H_{0}: \mu = 101.5\\H_A: \mu > 101.5

We use one-tailed z test to perform this hypothesis.

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z_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{\sigma}{\sqrt{n}} }

Putting all the values, we have

z_{stat} = \displaystyle\frac{106.4 - 101.5}{\frac{15}{\sqrt{30}} } = 1.789

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Since,  

z_{stat} > z_{critical}

We reject the null hypothesis and accept the alternate hypothesis.

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