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Colt1911 [192]
3 years ago
12

Express as a trinomial. (x-3)(3x+6)

Mathematics
1 answer:
Strike441 [17]3 years ago
4 0

Answer:

3x^2 - 3x + 18

Step-by-step explanation:

x*3x=3x^2

(x*6)+(-3*3x)=-3x

-3*6=-18

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What is the sum of (7x - 6y) and (x plus y)
Ymorist [56]
Heya user

we have

7x - 6y and x + y

according to the question

( 7x - 6y ) + ( x + y )

→ 7x - 6 y +x + y

→ 8x - 5y

Hope This helps you
3 0
3 years ago
True or False. The mapping diagram shows a function.
Anna [14]

Answer:

False.

Step-by-step explanation:

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3 years ago
In a week tracey earns $12.45 less than twice the amount Kayla earns. Tracy earns $102.45 write and solve an algebraic equation
abruzzese [7]

Answer:

Step-by-step explanation:

Tracey Earns in week= $102.45

Tracy=2x-12.45

102.45=2x-12.45

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2x=114.90

x= 114.90/2

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Kayla earns 57.45 dollars

5 0
3 years ago
Data accumulated by NOAA shows that the average annual precipitation for St. Louis, MO is 34 inches. If 17.75% of the time, the
Zarrin [17]

Answer:

The standard deviation for annual precipitation in St. Louis is 6.48 inches.

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 problem, we have that:

\mu = 34

If 17.75% of the time, the annual precipitation is more than 40 inches, what is the standard deviation for annual precipitation in St. Louis

This means that Z when X = 40 has a pvalue of 1-0.1775 = 0.8225. So when X = 40, Z = 0.925.

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

0.925 = \frac{40 - 34}{\sigma}

0.925\sigma = 6

\sigma = \frac{6}{0.925}

\sigma = 6.48

The standard deviation for annual precipitation in St. Louis is 6.48 inches.

8 0
3 years ago
Which is the value of this expression when x = negative 2 and y = negative 3?
aleksandrvk [35]

Answer:

-360

Step-by-step explanation:

4 0
3 years ago
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