Answer: x=-8
Step-by-step explanation:
X+5=1-4
X+5=-3
Now subtract 5 from both sides
X=-8
Answer:
It would be the first one or second one
Step-by-step explanation:
the answer is up ahead
Answer:
104 Inches
Step-by-step explanation:
Alyssa's blanket contains 7 pink stripes and 6 white stripes.
Total Number of Stripes =7+6=13
Since each stripe is 8 inches wide.
The width of Alyssa's blanket will be the product of the number of stripes by the width of each stripe.
Therefore:
Width = 13 X 8 Inches =104 Inches
Alyssa's blanket is 104 Inches wide.
Answer:
18
Step-by-step explanation:
I2=h2+r2
25(2)=h2+7(2)
50=h2+14
-14 -14
36=h2
÷2 ÷2
18=h
Answer:
A sample size of 385 is needed.
Step-by-step explanation:
We have that to find our 
level, that is the subtraction of 1 by the confidence interval divided by 2. So:
Now, we have to find z in the Ztable as such z has a pvalue of 
.
That is z with a pvalue of 
, so Z = 1.96.
Now, find the margin of error M as such
In which 
is the standard deviation of the population and n is the size of the sample.
You feel that a reasonable estimate of the standard deviation is 10.0 hours.
This means that 
What sample size is needed so that the expected margin of error of your estimate is not larger than one hour for 95% confidence?
A sample size of n is needed. n is found when M = 1. So
Rounding up:
A sample size of 385 is needed.
