The mean of the numbers 15,21,17,26,18 and 29 is 21. Calculate the standard deviation.
1 answer:
You might be interested in
<h3><u>Answer:</u></h3>
- 11. 6 + n = 20
- 12. n - 7 = 20
- 13. n + n + 1 = 31
- 14. 2n + 2 = 13
- 15. n - 1 = 18
- 16. n² + 4 = 2x
- 17. 2n = 1/2
- 18. n²/2 = 18
- 19. n/2 + 90/2 = 70
- 20. 2 + n = 12
Hoped this helped.
Answer:
Step-by-step explanation:
We want to find the value of x that satisfies both
- 9x + 4y = 8
and
-3x-y= 4
given the same value of y.
This is the x-value of the point of intersection of the graph of the two lines.
We make y the subject of the bottom equation to get:
y=-3x-4
We substitute y=-3x-4 into the top equation to get:
-9x+4(-3x-4)=8
Expand to get:
-9x-12x-16=8
Group like terms
-21x=24