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raketka [301]
3 years ago
11

(8 – 3r) 6 Need help simplify this expression

Mathematics
1 answer:
Alex787 [66]3 years ago
3 0
The answer is 6•(8-3r)
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Percentage grade averages were taken across all disciplines at a particular university, and the mean average was found to be 83.
Georgia [21]
Correct Ans:
Option A. 0.0100

Solution:
We are to find the probability that the class average for 10 selected classes is greater than 90. This involves the utilization of standard normal distribution.

First step will be to convert the given score into z score for given mean, standard deviation and sample size and then use that z score to find the said probability. So converting the value to z score:

z-score= \frac{90-83.6}{ \frac{8.7}{ \sqrt{10} } } \\  \\ 
z-score =2.326

So, 90 converted to  z score for given data is 2.326. Now using the z-table we are to find the probability of z score to be greater than 2.326. The probability comes out to be 0.01.

Therefore, there is a 0.01 probability of the class average to be greater than 90 for the 10 classes.
5 0
3 years ago
180=112+9x+5. Whats the value of X and why?
vovangra [49]

Answer:x=7

Step-by-step explanation:

180=112+9x+5

Collect like terms

180-112-5=9x

63=9x

Divide both sides by 9

63/9=9x/9

7=x

x=7

5 0
3 years ago
Find the circumference of this circle<br>c,d,a,g,be​
zheka24 [161]

A,G,B

IDK I think thats it

4 0
3 years ago
Write two word phrases for t+23
bixtya [17]
For a sum of a number t and 23
t plus 23

8 0
3 years ago
A cube has a surface area of 100 square inches
postnew [5]
 <span>1. 12 
2. 225 sq. ft. 
3. 6.25 sq. ft. 
4. no 
5. $3.00 
6. 6 

please make my answer best answer thank you 
p.s. the very first question is 600 sq. in.</span>
8 0
2 years ago
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