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SSSSS [86.1K]
3 years ago
8

If f(x)=-x^2+6x-1 and g(x)=3x^2-4x-1, find (f+g)(x)

Mathematics
2 answers:
GrogVix [38]3 years ago
5 0

The answer is 2x²+2x-2

kirill [66]3 years ago
3 0

Answer:

(f+g)(x)= 2x²+2x-2

Step-by-step explanation:

-x²+6x-1+3x²-4x-1 can be found by combining like terms.

2x²+2x-2

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Just write down the negative values of each withdrawal and add up those values for the first two.
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3 years ago
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The set of possible values of m is (5, 7, 9).
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The values of k are 4,5,6

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In two or more sentences, explain how to solve the cube root equation, 3√x−1+2=0
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Answer: PEMDAS


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3 years ago
Test scores are normally distributed with a mean of 500. Convert the given score to a z-score, using the given standard deviatio
Bond [772]

Answer:

The percentage of students who scored below 620 is 93.32%.

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this question, we have that:

\mu = 500, \sigma = 80

Percentage of students who scored below 620:

This is the pvalue of Z when X = 620. So

Z = \frac{X - \mu}{\sigma}

Z = \frac{620 - 500}{80}

Z = 1.5

Z = 1.5 has a pvalue of 0.9332

The percentage of students who scored below 620 is 93.32%.

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3 years ago
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You recently saw a news article that included this graph and had the title “A Nation of Procrastinators”. What evidence from the
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Answer: The graph shows that people procrastinate by doing their taxes mostly in April then in the beginning of the year in January

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