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saw5 [17]
3 years ago
5

A spinner has 8 equal sections number 1 through 8. The theoretical probability of it landing on 7 when spin is 1/8 or 12.5%. The

students in Mr. Smith's class ran an experiment, each student by spinning the spinner 25 times. There are 32 students in the class. It landed on 7 ninety-five times. What is the experimental probability?
Mathematics
1 answer:
sweet [91]3 years ago
4 0

Answer:

The answer to this is 16%



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A manager wishes to determine the relationship between the number of miles traveled​ (in hundreds of​ miles) by her sales repres
kati45 [8]

Answer:

y=3.53 x +37.92  

And for 0 miles if we use the model we got:

y(0)= 3.53*0 +37.92 = 37.92

But for this case. No is not reasonable for a representative to travel o miles and have a positive amount of sales.

Step-by-step explanation:

For this case we assume the following data:

Miles traveled (X): 2,3,10,7,8,15,3,1,11

Sales (Y): 31,33,78,62,65,61,48,55,120

We want to found a linear model like this one : y = mx+b. Where:

m=\frac{S_{xy}}{S_{xx}}  

Where:  

S_{xy}=\sum_{i=1}^n x_i y_i -\frac{(\sum_{i=1}^n x_i)(\sum_{i=1}^n y_i)}{n}  

S_{xx}=\sum_{i=1}^n x^2_i -\frac{(\sum_{i=1}^n x_i)^2}{n}  

With these we can find the sums:  

S_{xx}=\sum_{i=1}^n x^2_i -\frac{(\sum_{i=1}^n x_i)^2}{n}=582-\frac{60^2}{9}=182  

S_{xy}=\sum_{i=1}^n x_i y_i -\frac{(\sum_{i=1}^n x_i)(\sum_{i=1}^n y_i)}{n}=4329-\frac{60*553}{9}=642.33  

And the slope would be:  

m=\frac{642.33}{182}=3.529  

Nowe we can find the means for x and y like this:  

\bar x= \frac{\sum x_i}{n}=\frac{60}{9}=6.667  

\bar y= \frac{\sum y_i}{n}=\frac{553}{9}=61.444  

And we can find the intercept using this:  

b=\bar y -m \bar x=61.444-(3.529*6.667)=37.917  

So the line would be given by:  

y=3.53 x +37.92  

And for 0 miles if we use the model we got:

y(0)= 3.53*0 +37.92 = 37.92

But for this case. No is not reasonable for a representative to travel o miles and have a positive amount of sales.

8 0
3 years ago
1. Solve -y/12 = 6<br> 2. Solve x/4 = 8
OlgaM077 [116]

1. Isolate the y. Note the equal sign. What you do to one side, you do to the other. Do the opposite of PEMDAS.

First, multiply 12 to both sides

-y/12(12) = 6(12)

-y = 6(12)

-y = 72

Isolate the y. Divide -1 from both sides

-y/-1 = 72/-1

y = -72

-72 is your answer for y

--------------------------------------------------------------------------------------------------------------

2. Isolate the x. Note the equal sign. What you do to one side, you do to the other. Do the opposite of PEMDAS.

x/4 = 8

First, multiply 4 to both sides

x/4(4) = 8(4)

x = 8(4)

x = 32

32 is your answer for x

--------------------------------------------------------------------------------------------------------------

hope this helps

4 0
3 years ago
Please helppp!!!!!!!
Anni [7]

translation to the left by two units and then reflection over the x-axis

3 0
3 years ago
which property is illustrated by the following statement? 2(-3/9)=(-3/9)2^? Associative Property of Addition, Commutative Proper
Ratling [72]

Consider the given statement:

2(\frac{-3}{9}) = (\frac{-3}{9})2

We have to identify the property used in this statement.

1. Associative Property of Addition: Let a,b and c be three real numbers. This property states that a+(b+c) = (a+b)+c. This property is not used in the given statement.

2. Commutative property of multiplication: Let 'a' and 'b' be two real numbers. This property states that a \times b = b \times a.

In the given statement,2(\frac{-3}{9}) = (\frac{-3}{9})2

This statement holds commutative property of multiplication as whether 2 is multiplied to \frac{-3}{9} or \frac{-3}{9} is multiplied to 2, the result is same.

So, Commutative property of multiplication is illustrated in this statement.

3. Inverse property of multiplication: A number 'a' is said to have an inverse '\frac{1}{a}' if a \times \frac{1}{a}=1. This property is not used in the given statement.

4. Commutative property of addition: Let 'a' and 'b' be two real numbers. This property states that a+b = b+a. This property is not used in the given statement.

3 0
4 years ago
Read 2 more answers
Really need help like help on math.... ​
notka56 [123]

Answer:

$16 per pair of shoes and $36 per pair of boots

Step-by-step explanation:

16*2+36*3=140

I hope that this helps :)

6 0
3 years ago
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