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3 years ago

I WILL GIVE BRAINLIEST ANSWER TO THE CORRECT ANSWER!! PLEASE ASAP

Mathematics

1 answer:

Vaselesa [24]3 years ago

3 0

Answer:

1.5

Step-by-step explanation:

the slope is regarded as :

= $\frac{y2-y1}{x2-x1}$

this is also known as the <em>gradient </em>, meaning the differences of two y values divided by the differences of the two corresponding x values

take two values on the slope and put in the form ( x,y)

we shall use two points A and B

A = (80 , 100)

B = (20 , 10)

now use the formula:

$\frac{10-100}{20-80}$

= $\frac{-90}{-60}$

= $\frac{3}{2}$

also can be represented into an integer form

answer is <u>1.5</u>

You might be interested in

7. point A(-2, 7); parallel to the line y = - 3x - 4

aniked [119]

Answer:

y=-3x+1

Step-by-step explanation:

plug in point into x and y, replace -4 as a +b(or any other variable to represent y intercept)

therefore,

7=-3(-2)+b

7=6+b

1=b

y=-3x+1

8 0

3 years ago

To anyone who wants points I have some questions here!

Alexxx [7]

Answer:

answer below

Step-by-step explanation:

7)x greater than or equal to 15

8) x is less than 96

8 0

3 years ago

The distribution of the number of viewers for the American Idol TV broadcasts follows the normal distribution of a mean of 29 mi

e-lub [12.9K]

Answer:

a) $P(30$

And we can find this probability on this way:

$P(0.2$

And in order to find these probabilities we can find tables for the normal standard distribution, excel or a calculator.

$P(0.2$

b) $P(X\geq 23)=P(\frac{X-\mu}{\sigma}\geq \frac{23-\mu}{\sigma})=P(Z\geq \frac{23-29}{5})=P(Z\geq -1.2)$

And in order to find these probabilities we can find tables for the normal standard distribution, excel or a calculator.

$P(Z\geq -1.2)=1-P(Z$

c) $P(X> 40)=P(\frac{X-\mu}{\sigma}> \frac{40-\mu}{\sigma})=P(Z\geq \frac{40-29}{5})=P(Z> 2.2)$

And in order to find the probabilitiy we can use tables for the normal standard distribution, excel or a calculator.

$P(Z>2.2)=1-P(Z$

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".

2) Part a

Let X the random variable that represent the number of viewers for the American Idol TV of a population, and for this case we know the distribution for X is given by:

$X \sim N(29,5)$