find the mean, range ,and median of these values 12,4,-2,0,9.-2,1,7,8,2 recall the range is calculated by finding the difference
Lubov Fominskaja [6]
Put numbers in order
-2,-2,0,1,2,4,7,8,9,12
Mean add all the numbers = 39 divide 39 by the number of of numbers on the list which is 10. 39/10 = 3.9
Mean = 3.9
Range is the number of spots between -2 and 12 = 14
Range =14
Median is the middle number in the list there are two middle numbers 2 and 4. Add these together to get 6. Divide 6 by the number 2 because that is how many numbers you had to add. 6/2=3. The is not on the list but it is the average of the two terms.
Median =3
Answer:
After 2.5 minutes the pool will have 27 gallons of water.
Step-by-step explanation:
The pool has already 12 gallons of water and Eric wants to fill it to at least 27 gallons.
The water is flowing at a rate of 6 gallons per minute.
Let, after t minutes the pool will have at least 27 gallons of water.
Therefore, we can write the equation as
27 = 12 + 6t
⇒ 6t = 15
⇒ t = 2.5 minutes.
Therefore, after 2.5 minutes the pool will have 27 gallons of water. (Answer)
Step-by-step explanation:
- If the stock goes up 30%, it's multiplied by
.
The reason is that 
- If the stock goes down 20%, it's multiplied by

The reason is that 
- If the stock goes down 30%, it's multiplied by

The reason is that 
- If the stock goes up 40%, it's multiplied by
.
The reason is that 
So
If you increase it by 30% and then drop it by 20%, it means you are multiplying it by
and then multiplying it by
. In other words:

So, the net gain is = .04
Assume the original value = 500
Increase it by 30% and it becomes 650
Decrease 650 by 20% and it becomes 520
So, the net gain = 20
Verification:
And
If you drop it by 30% and then increase it by 40%, you are multiplying it by .7 and then multiplying it by 1.4. In other words:

So, the net loss is = 1 - 0.98 = .02
Assume the original value = 500
Decrease it by 30% and it becomes 350.
increase 350 by 40% and it becomes 490.
So, the net loss is = 10
Verification:

Keywords: stock, loss, gain
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Answer:
y= 5 x= 2
Step-by-step explanation:
-3x+5y=2x+3y
5y=5x+3y
2y=5x