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2 years ago

How to find the perimeter?

Mathematics

1 answer:

Gemiola [76]2 years ago

8 0

Answer:

Step-by-step explanation:

The angles are equal. This means that the triangle is equilateral and all the sides are equal to each other.

Set any two sides equal to each other.

2x - 3 = x + 5

x - 3 = 5

x = 8

Now substitute this x value into all the sides and add the numbers up.

2(8) - 3 = 16 - 3 = 13

So we know all 3 sides equal 13.

13 * 3 = 39

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Below are the jersey numbers of 11 players randomly selected from a football team. Find the range, variance, and standard deviat

Aleksandr-060686 [28]

Answer:

Range = 71

Variance = 546.0

Standard Deviation = 23.4

Option A) Jersey numbers are nominal data that are just replacements for names, so the resulting statistics are meaningless.

Step-by-step explanation:

We are given the following data set in the question:

33, 29, 97, 56, 26, 78, 83, 74, 65, 47, 58

Formula:

$\text{Standard Deviation} = \sqrt{\displaystyle\frac{\sum (x_i -\bar{x})^2}{n-1}}$

$\text{Variance} = \displaystyle\frac{\sum (x_i -\bar{x})^2}{n-1}$

where $x_i$ are data points, $\bar{x}$ is the mean and n is the number of observations.

$Mean = \displaystyle\frac{\text{Sum of all observations}}{\text{Total number of observation}}$

$Mean =\displaystyle\frac{646}{11} = 58.7$

Sum of squares of differences = 5460.18

$\text{Variance} = \frac{5460.18}{11} = 546.0$

$S.D = \sqrt{\frac{5460.18}{10}} = 23.4$

Sorted Data Set: 26, 29, 33, 47, 56, 58, 65, 74, 78, 83, 97

Range = Maximum - Minimum

Range = 97 - 26 = 71

Based on the values, we can say that

Option A) Jersey numbers are nominal data that are just replacements for names, so the resulting statistics are meaningless.

6 0

3 years ago

In the expression 85x - 99 what represents the coefficient?

inna [77]

Answer:

la aplicacion me gusta mucho la verdad

3 0

2 years ago

Read 2 more answers

when solving a multi-step equation,does it matter in which order the operations are performed?explain.

rjkz [21]

Yes or course. PEMDAS
Parenthesis
Exponents
Multiplication-Division (solve left to right)
Addition- Subtraction (solve left to right)
example, lets take a simple equation.
32+6x7-1+4²
Let's solve it left to right
You're answer would be 281
But when using PEMDAS your answer is- 89
Check out this video for extra help.
https://www.khanacademy.org/math/pre-algebra/pre-algebra-arith-prop/pre-algebra-order-of-operations/...

5 0

2 years ago

Read 2 more answers

HELP PLZ SORRY LAST ONE WAS BLURRY

Andru [333]

0.25 ....decimal

3/4, 3:4....ratio

2/3 = 6/9....equivalent fractions, fractions

4/8 --> 1/2....equivalent fractions,fraction,simplest form

8 0

3 years ago

PLEASE HELP ILL DO ANYTHING

yuradex [85]

Answer:

B) 2 1/4