Ag
Step-by-step explanation:
Answer: Domain is (negative infinity,infinity)
Step-by-step explanation:
Answer:
Now we just take square root on both sides of the interval and we got:
For this case we can conclude that the true deviation at 90% of confidence is between 734.783 and 1657.489
Step-by-step explanation:
The confidence interval for the population variance is given by the following formula:
The sample deviation is s=1007.4542
The degrees of freedom are:
The confidence is 0.90 or 90%, and the significance would be and , and the critical values are:
Replacing the info given we got:
Now we just take square root on both sides of the interval and we got:
For this case we can conclude that the true deviation at 90% of confidence is between 734.783 and 1657.489
Answer:
45
Step-by-step explanation:
u add
Answer:
(-2, 9)
Step-by-step explanation:
1) Multiply each term of the top equation by two.
2(x) + 2(y) = 2(7)
2x + 2y = 14
2) Use elimination to get rid of the y's
2x + 2y = 14
-(5x + 2y = 8)
Translates to...
2x + 2y = 14
+ (-5x - 2y = -8)
= -3x = 6
3) Solve for x by dividing each side of the equation by -3.
x = -2
4) Plug in x to find the y-value
x + y = 7
-2 + y = 7
-2 + 2 + y = 7 + 2
y = 9
I hope this helps!