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3 years ago

What are two 2-digit numbers that have a sum of 83?

Mathematics

2 answers:

Ahat [919]3 years ago

7 0

There are many ways to answer this question, but one example is 13 + 70 = 83

olya-2409 [2.1K]3 years ago

4 0

53+30 is two did-gets that help you get 83 as your answer.

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The data (1.5.8.5.1) represent a random sample of the number of days absent from school for five students at Monta Vista High. F

lianna [129]

Answer:

$\bar X = \frac{1+5+8+5+1}{5}= \frac{20}{5}= 4$

$\sigma= \sqrt{\frac{(1-4)^2 +(5-4)^2 +(8-4)^2 +(5-4)^2 +(1-4)^2}{5}} =\sqrt{\frac{36}{5}}= 2.68$

And based on this the best answer would be:

a. mean = 4; standard deviation = 2.68

Step-by-step explanation:

For this case we have the following data given:

1,5,8,5,1

We can find the sample mean with the following formula:

$\bar X = \frac{\sum_{i=1}^n X_i}{n}$

And replacing we got:

$\bar X = \frac{1+5+8+5+1}{5}= \frac{20}{5}= 4$

And for the deviation (assuming that the correct approximation is the deviation for a population) we can calculate the deviation with the following formula:

$\sigma = \sqrt{\frac{\sum_{i=1}^n (X_i -\bar X)^2}{n}}$

And replacing we got:

$\sigma= \sqrt{\frac{(1-4)^2 +(5-4)^2 +(8-4)^2 +(5-4)^2 +(1-4)^2}{5}} =\sqrt{\frac{36}{5}}= 2.68$

And based on this the best answer would be:

a. mean = 4; standard deviation = 2.68

3 0

3 years ago

Will a dilation with a scale factor of 10 create an enlargement or a reduction?

tigry1 [53]

Answer:

Step-by-step explanation:

scale factor of 10 is an enlargement

scale factor greater then 1 is an enlargement

scale factor between 0 and 1 is a reduction

scale factor of 1 , they stay the same

3 0

3 years ago

You have a bag of 12 marbles. Four are blue, 6 are green, 2 are red, and the others are yellow. What is the probability of drawi

8090 [49]

Answer:

$Probability = \frac{1}{11}$

Step-by-step explanation:

Given

$Blue = 4$

$Green = 6$

$Red = 2$

$Total = 12$

Required

Determine the probability of drawing red and green without replacement

This is calculated as follows:

$Probability = P(Red\ and\ Green)$

$Probability = P(Red)\ and\ P(Green)$

$Probability = \frac{n(Red)}{Total} * \frac{n(Green)}{Total - 1}$

We used Total - 1 because it's a probability without replacement:

$Probability = \frac{2}{12} * \frac{6}{12- 1}$

$Probability = \frac{2}{12} * \frac{6}{11}$

$Probability = \frac{1}{6} * \frac{6}{11}$

$Probability = \frac{1}{11}$

<em>Hence, the required probability is 1/11</em>

5 0

3 years ago

Manny and Emma are both competing in a long jump competition at their school. Manny can jump four fifths of the distance that Em

tigry1 [53]

Let us assume the distance that Emma can jump = x
Then
The distance that Manny can jump = 4x/5
The distance that manny can jump is also given and that is = 40 inches
Then
4x/5 = 40
4x = 40 * 5
4x = 200
x = 50 inches
From the above deduction, it can be concluded that the correct option among all the options that are given in the question is the second option or option "B".

5 0

4 years ago

This is the rest of those 2 step equations with fractions teacher didnt help and taking a test over this tomorrow. Please help a

NNADVOKAT [17]

The answers to the questions

3 0

3 years ago