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netineya [11]
3 years ago
5

A line passes through the points (2, 9) and (0, 3). What is its equation in slope-intercept form?

Mathematics
1 answer:
Evgen [1.6K]3 years ago
7 0

Answer:Y=3x+3

Step-by-step explanation: Use the slope formula(m=y2-y1/x2-x1) to find the slope of 3. Then use the point slope formula((y-y1=m(x-x1)) to get the equation.

You might be interested in
The distance between two towns on a map is 2.5 centimeters. The map uses a scale where 1 centimeter represents 50 kilometers. Wh
lidiya [134]

Answer:

125 kilometers

Step-by-step explanation:

2.5 * 50 = 125

4 0
4 years ago
24 ft equals how many inches.
Lerok [7]
288 inches is in 24 feet.
6 0
3 years ago
A rocket is divided into three sections. The top section is one sixth the length of the bottom section . The middle section is o
Anastaziya [24]

Answer:

18 feet long.

Step-by-step explanation:

Let the bottom section be x feet long, then:

x/6 + x/2 + x = 180

Multiply through by 6:

x + 3x + 6x = 1080

10x = 1080

x = 108 feet,

So the top section = 108/6

= 18 feet long.

7 0
4 years ago
Fill in the blank. In a drive thru performance study, the average service time for McDonald's is 203.21 seconds with a standard
Alenkasestr [34]

Answer:

5) 203.35

Step-by-step explanation:

To solve this question, we need to understand the normal probability distribution and the central limit theorem.

Normal Probability Distribution:

Problems of normal distributions can be solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the z-score 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 p-value, we get the probability that the value of the measure is greater than X.

Central Limit Theorem

The Central Limit Theorem establishes that, for a normally distributed random variable X, with mean \mu and standard deviation \sigma, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}.

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

The average service time for McDonald's is 203.21 seconds with a standard deviation of 5.67 seconds.

This means that \mu = 203.21, \sigma = 5.67

Sample of 90

This means that n = 90, s = \frac{5.67}{\sqrt{90}} = 0.59767

There is a 51% chance that the average drive-thru service time is less than ________ seconds.

X when Z is in the 51st percentile, that is, has a p-value of 0.51, so X when Z = 0.025.

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

By the Central Limit Theorem

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

0.025 = \frac{X - 203.21}{0.59767}

X - 203.32 = 0.025*0.59767

X = 203.35

203.35 seconds.

3 0
3 years ago
Students at a certain school were​ surveyed, and it was estimated that 10​% of college students abstain from drinking alcohol. T
MissTica

Answer:

a)

<em> you are unwilling to predict the proportion value at your school  = 0.90</em>

<em>b) </em>

<em>The large sample size 'n' = 864</em>

<em></em>

Step-by-step explanation:

Given estimated proportion 'p' = 10% = 0.10

<em>Given Margin of error M.E = 0.02</em>

<em>Level of significance α = 0.05</em>

a)

<em>  you are unwilling to predict the proportion value at your school </em>

<em>   q = 1- p = 1- 0.10 =0.90</em>

b)

<em>The Margin of error is determined by</em>

                        M.E = \frac{Z_{\frac{\alpha }{2} } \sqrt{p(1-p)} }{\sqrt{n} }

                       0.02 = \frac{1.96 X \sqrt{0.10 (0.90)} }{\sqrt{n} }

Cross multiplication , we get

                      \sqrt{n}  = \frac{1.96 X \sqrt{0.10 (0.90)} }{0.02 }

                      √n  = 29.4

<em>Squaring on both sides , we get</em>

<em>                      n = 864.36</em>

<u><em>Conclusion</em></u><em>:-</em>

<em>The large sample size 'n' = 864</em>

<em></em>

<em></em>

7 0
3 years ago
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