Answer:
Step-by-step explanation:
Answer:
-The mean will decrease, and the median will stay the same.
Step-by-step explanation:
Before the point was added, the median was 45. The middle point is the 7th point The 7th point was 45. Now there are 14 points. We add the 7th and 8th points together and divide by 2 (Remember to place a point at 15) (45+45) /2 The median stays at 45
Choice A is the only answer in which the median stays the same
Answer:
1)
2)
3)
Step-by-step explanation:
So we know that the perimeter of the rectangle is 50.
The formula for the perimeter of a rectangle is given by:
Where l is the length and w is the width.
The length is (x+5) and the width is (x).
Thus, substitute (x+5) for l and (x) for w. Also substitute 50 for P. Therefore:
And that's our equation.
To solve, first distribute:
Combine like terms:
Subtract 10 from both sides:
Divide everything by 4:
So, the value of x is 10.
The length is the longer side. Thus, it is (x+5).
We now know that x is 10, substitute:
So, the length is 15 units.
Answer: B) 160
<u>Step-by-step explanation:</u>
Since the Standard deviation of 21 bins is 3 bins, then the first 7 bins falls in the first 2.5% edge of the bell curve.
2.5% of 21 times 1000 = (0.025)(21)(1000) = 160