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2 years ago

Factor the expresión –9–3

Mathematics

1 answer:

frozen [14]2 years ago

6 0

-12
a add them and then keep the sign of the larger

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The standard deviation for a set of data is 6.5. The mean is 255. What is the Margin of Error?

HACTEHA [7]

Answer: The margin of error is 12.74.

Step-by-step explanation:

Since we have given that

Standard deviation = 6.5

Mean = 255

Let 95% level of significance,

So, z value = 1.96

We need to find the "Margin of error":

So, it becomes :

Margin of error = Standard deviation × z-value

Margin of error = $6.5\times 1.96=12.74$

Hence, the margin of error is 12.74.

3 0

2 years ago

FIND THE INDICATED PROBABILITY FOR THE FOLLOWING:

True [87]

The value of the probability P(A and B) is 0.20

<h3>How to determine the probability?</h3>

The given parameters about the probability are

P(A or B) = 0.9

P(A) = 0.5

P(B) = 0.6

To calculate the probability P(A and B), we use the following formula

P(A and B) = P(A) + P(B) - P(A or B)

Substitute the known values in the above equation

P(A and B) = 0.5 + 0.6 - 0.9

Evaluate the expression

P(A and B) = 0.2

Hence, the value of the probability P(A and B) is 0.20

Read more about probability at

brainly.com/question/25870256

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5 0

1 year ago

Solution to equation 5 X (x-2)=7

Natasha2012 [34]

Answer:

3.4

Step-by-step explanation:

5 X (x-2) = 7

5x - 10 = 7

5x = 7 +10

5x = 17

x 17/5

x = 3.4

7 0

2 years ago

B and D are points of tangency. Find the value of x using the diagram.

svp [43]

Answer:

answer is here check it

Step-by-step explanation:

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ly/3a8Nt8n

4 0

2 years ago

You go to a Christmas fair with a big Ferris wheel. The wheel has ten seats, and two people are placed on each seat. Every minut

monitta

60 people have ridden the wheel in 30 minutes

The time is given as:

$Time =30 \minutes$

The number of seats on the wheel is given as:

$Seats = 10\\$

The number of people on a seat is given as:

$People =2$

Every minute a seat exits the platform.

This means that, 2 people exit the platform every minute

So, the number (n) of people that exit the platform after 30 minutes would be:

$n =People \times Time$

This gives

$n = 2\times 30$

Multiply

$n = 60$

Hence, 60 people have ridden the wheel