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zhuklara [117]
3 years ago
10

WRITE THE EQUATION, IN THE FORM y=mx + b, that represents the line shown on the graph.

Mathematics
1 answer:
ollegr [7]3 years ago
3 0

Answer:

y = 3/2x - 2

General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right

<u>Algebra I</u>

Slope Formula: m=\frac{y_2-y_1}{x_2-x_1}

Slope-Intercept Form: y = mx + b

  • m - slope
  • b - y-intercept

Step-by-step explanation:

<u>Step 1: Define</u>

<em>Find points from graph.</em>

y-intercept (0, -2)

Random Point (2, 1)

<u>Step 2: Find slope </u><em><u>m</u></em>

  1. Substitute [slope formula]:          m=\frac{1+2}{2-0}
  2. Add/Subtract:                               m=\frac{3}{2}

<u>Step 3: Write equation</u>

<em>Substitute into General Form</em>

y = 3/2x - 2

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If outliers are discarded, then the retirement savings by residents of Econistan is normally distributed with a mean of $100,000
zavuch27 [327]

Answer:

P(X>117000)=P(\frac{X-\mu}{\sigma}>\frac{117000-\mu}{\sigma})=P(Z>\frac{117000-100000}{20000})=P(z>0.85)

And we can find this probability using the complement rule and the normal standard table or excel:

P(z>0.85)=1-P(z

The firgure attached illustrate the problem

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

Solution to the problem

Let X the random variable that represent the retirement savings of a population, and for this case we know the distribution for X is given by:

X \sim N(100000,20000)  

Where \mu=100000 and \sigma=20000

We are interested on this probability

P(X>117000)

And the best way to solve this problem is using the normal standard distribution and the z score given by:

z=\frac{x-\mu}{\sigma}

If we apply this formula to our probability we got this:

P(X>117000)=P(\frac{X-\mu}{\sigma}>\frac{117000-\mu}{\sigma})=P(Z>\frac{117000-100000}{20000})=P(z>0.85)

And we can find this probability using the complement rule and the normal standard table or excel:

P(z>0.85)=1-P(z

The firgure attached illustrate the problem

7 0
3 years ago
Select the correct answer from the drop-down menu.<br> Fill in the missing number in the equation.
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Answer:

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Step-by-step explanation:

what equation

5 0
3 years ago
Factor 24j - 16 to identify the equavalnet expressions
OLEGan [10]

Answer:

Possible answers:

(24) x j - 16

8 x (3j - 2)

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Find the value of x. The figure is not drawn to scale.<br><br> LOOK AT THE PICTURE ASAP!
MArishka [77]

Answer:

from the graph I think it's 16

7 0
2 years ago
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You and your friend are having a race, but since you are faster than him, you decide to give him a head start. He starts 10m in
Diano4ka-milaya [45]

Answer:

20 seconds

Step-by-step explanation:

Your friend starts 10 meters in front of the starting line.

You start from the starting line.

You run at 6 meters/ second.

Your friend runs at 5.5 meters/second.

You and your friend will be at the same distance from the starting line only when you are able to catch your friend.

The relative speed between you two is the difference in your speed and your friend's speed that is:

6-5.5=0.5m/s

So to cover 10 meters of separation at the speed of 0.5 meter/second it will take:

t=\frac{10}{0.5}= \frac{100}{5}=20s

So it will take 20 seconds for you and your friend to be at the same distance from the starting line.  

8 0
3 years ago
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