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3 years ago

20 pt what do you see

Mathematics

1 answer:

GrogVix [38]3 years ago

8 0

A watermarked picture by Shutterstock, known as a stock photo with the photo displaying "LOL" and comic like explosion.

I have no idea what you are asking about so I will take your question literally.

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An average of 20 pears were sold from Monday to Friday. After the sales on Saturday and Sunday, the average pears sold per day w

Fittoniya [83]

Answer:

5 pears

Step-by-step explanation:

Given that

The average of 20 pears were sold from Monday to Friday

But after the sales on Saturday and Sunday, the average pears sold per day were increased to 25

We need to determine the number of pears sold on Saturday and sunday

So, it is

= 25 pears - 20 pears

= 5 pears

4 0

3 years ago

2(5*3)+2(5*8)+2(3*8)

AlladinOne [14]

158, because due to PEMDAS you would do all the functions in the parenthesis first, then you would move on to multiplication, and finally you would find the sum of the equation

7 0

3 years ago

How do you work out the area of a triangle?

Alekssandra [29.7K]

The formula is A= 1/2b x h
Area = half of the base multiplied by the height of the triangle

8 0

3 years ago

In the data set below, what is the mean absolute deviation? 3 8 6 9 2 5

zepelin [54]

<h3>Answer: Approximately 2.1667</h3>

==========================================================

Explanation:

First we need to find the arithmetic mean.

Add up the values to get 3+8+6+9+2+5 = 33

Divide this over 6 because there are 6 values: 33/6 = 5.5

The mean is 5.5

------

Subtract the mean from each data value. Apply absolute value to ensure the result is not negative.

|3 - 5.5| = |-2.5| = 2.5
|8 - 5.5| = |2.5| = 2.5
|6 - 5.5| = |0.5| = 0.5
|9 - 5.5| = |3.5| = 3.5
|2 - 5.5| = |-3.5| = 3.5
|5 - 5.5| = |-0.5| = 0.5

Each result represents how far that specific data value is from the mean. Absolute value is used to find distance on a number line.

Add up each of those results to get: 2.5+2.5+0.5+3.5+3.5+0.5 = 13

Then divide by 6 to find the average: 13/6 = 2.1667 which is approximate

The mean absolute deviation represents the average distance any given value is from the mean. The term "deviation" refers to how far each data value is from the mean, which is the center point we're after more or less.

The MAD (mean absolute deviation) effectively measures how spread out the data set is. The larger the MAD, the more spread out the data is likely to be. The range, standard deviation and variance are also measures of spread.

6 0

3 years ago

A textbook company states that the average time a student needs to take a quiz from its book is 30 minutes with a standard devia

faltersainse [42]

Answer:

We conclude that her students, on average, do not take 30 minutes on the quiz, contrary to what the textbook company states.

Step-by-step explanation:

We are given;

Population mean; μ = 30 minutes

Population standard deviation; σ = 3 minutes

Sample size; n = 10

Sample mean; x¯ = 25

Significance level = 5% = 0.05

Let's define the hypotheses;

Null hypothesis; H0: μ = 30

Alternative hypothesis: Ha: μ ≠ 30

Let's find the test statistic;

z = (x¯ - μ)/(σ/√n)

z = (25 - 30)/(3/√10)

z = -5.27

From online p-value from z-score calculator attached using, z = -5.27, significance level = 0.05, two tailed hypothesis, we have;

p < 0.00001

This is less than the significance level, and so we will reject the null hypothesis and conclude that Her students, on average, do not take 30 minutes on the quiz, contrary to what the textbook company stated.

8 0

2 years ago

Read 2 more answers