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Ulleksa [173]
2 years ago
13

Which expression is eqivalent to 4(9+3)

Mathematics
1 answer:
Black_prince [1.1K]2 years ago
7 0

You could do

36+12

4*12

4*9+12

(4*9)+(3*4)

and many more!

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Mr. Moran chose 10 different test scores out of 50, and they are shown below. For the following set of data, find the mean test
frozen [14]

Answer:

39.5

Step-by-step explanation:

5 0
2 years ago
The number of tickets purchased by an individual for Beckham College's holiday music festival is a uniformly distributed random
Zanzabum

1) Mean: 6.5

2) Standard deviation: 3.2

Step-by-step explanation:

1)

A uniform random distribution is the distribution of a variable that can assume n different values, and each of these values is equally likely to occur.

This means that the probability of occurring of each of these values is the same:

p(x_1)=p(x_2)=...=p(x_n)

For a uniform random distribution, the mean of the distribution is simply equal to the median value of the distribution, which is exactly at the center of the distribution itself. It can be calculated as

\bar x = \frac{1}{2}(a+b)

where

a is the lowest value of the distribution

b is the highest value of the distribution

Here the distribution consists of all values ranging from 1 to 12, so:

a = 1

b = 12

Therefore the mean value is

\bar x=\frac{1}{2}(1+12)=6.5

2)

For a uniform random distribution, it can be dimostrated that the variance of the distribution is

\sigma^2 = \frac{1}{12}(b-a)^2

For the distribution in this problem, we have:

a = 1

b = 12

Therefore the variance is

\sigma^2 = \frac{1}{12}(12-1)^2=10.08

The standard deviation is the square root of the variance, therefore for this distribution it is:

\sqrt{\sigma^2}=\sqrt{10.08}=3.2

Learn more about mean and standard deviation:

brainly.com/question/6073431

brainly.com/question/8799684

brainly.com/question/4625002

#LearnwithBrainly

3 0
3 years ago
Can someone help me with this?
stepladder [879]
Answer: -4F and 3

Explanation: combine -F and -3F makes -4F and 14 - 11 = 3
5 0
2 years ago
Read 2 more answers
Choose the equations that are not linear equations. -x - y = 2 x 2 + y = 4 - y 3 = 1 x = 5
NeX [460]
X² + y = 4 and -y³ = 1x -5 are not linear equation because they contain a variable with a exponents. These types of equation are called quadratic equations. 
5 0
3 years ago
The length of an insect’s wing, drawn at a scale of 50:1, is 15 cm. What is the actual length of the wing?
MaRussiya [10]
The answer is 750.
15×50=750.
3 0
3 years ago
Read 2 more answers
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