At 95% confidence interval, the z score is 1.96. Using the
formula:
Confidence Interval = x ± z s / sqrt (n)
where x is the average time served, s is standard deviation
and n is number of samples
Confidence interval = 7.5 ± (1.96 * 3) / sqrt (400)
Confidence interval = 7.5 ± 0.294
<span>Confidence interval = 7.206 to 7.794</span>
Answer: X = -36
Step-by-step explanation:
X/-2 = 18 we need to get the variable alone, so we need to get rid of the /-2 to get x alone. And whatever we do to one side we have to do to the other so:
X/-2 = 18
X/-2 • (-2) = 18 • (-2)
The /-2 cancels out so we are left with
X = -36
4 TIMES THE HEIGHT OF A KIWI = 4X20 INCHES TALLER = 4X+20 4X+20 = 108 -20 = - 20 (Subtract 20 from both sides) 4X = 88 4X/4 =88/4 <span>X= 22 inches</span>
The answer is A, “Obtuse triangle.”
How to simplify:
9+(-2) would be just 9 - 2 = 7 -2 would 5
The answer is 5
Hope this helps
