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VashaNatasha [74]
3 years ago
9

Write an equation in slope intercept form that passes through two points (-2,15) (9,18)

Mathematics
1 answer:
Naddik [55]3 years ago
7 0
The slope of the line is 3/11x
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Which is the range of the function f(x) 1/7(9)x?
SSSSS [86.1K]

Answer:

Range of f(x) = 1/7(9)^x is all real numbers greater than 0.

5 0
3 years ago
Scores on a test have a mean of 78.2 and 8 percent of the scores are above 89. The scores have a distribution that is approximat
anyanavicka [17]

Answer:

The standard deviation is 7.7

Step-by-step explanation:

Problems of normally distributed samples can be 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 = 78.2

8 percent of the scores are above 89

This means that X = 89 has a pvalue of 1 - 0.08 = 0.92. So when Z = 89, Z = 1.405.

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

1.405 = \frac{89 - 78.2}{\sigma}

1.405\sigma = 10.8

\sigma = \frac{10.8}{1.405}

\sigma = 7.7

The standard deviation is 7.7

5 0
3 years ago
Help me please !!!!!​
kow [346]

Answer:

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Step-by-step explanation:

3 0
3 years ago
A student's pay of $21 an hour is $6 more than twice the amount the student earns per hour at an internship. Enter and solve an
saul85 [17]

w = amount she earns for her work.

twice that is 2*w, or 2w.

6 more than that is 2w + 6.


\bf 21~~\stackrel{is}{=}~~\stackrel{\textit{twice her earnings + 6}}{2w +6}\implies 15=2w\implies \cfrac{15}{2}=w\implies 7\frac{1}{2}=w

8 0
4 years ago
Find the area of this shape​
docker41 [41]

Answer:

63

Step-by-step explanation:

7 x 3 + 6 x 7

21     +   42

      63

8 0
4 years ago
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