2 x B + 4 = -8
-4 -4
2 x B = -12
divide by 2 on both sides
B = -6
Answer:77 and 87
Step-by-step explanation:
7×6=42 + 5+7=35/\ 35+42=77(first outcome)
7×6=42 + 5×9=45/\42+45=87 (second outcome.
Answer:
D. 19/30
Step-by-step explanation:
count how many tiles there are and then count how many yellow tiles and odd tiles there are. add the number yellow and odd tiles together and divide the sum by how many tiles there are.
60 tiles
3 yellow tiles
35 odd tiles
35+3=38
38/60=19/30
Answer:
The minimum sample size required is 5,499 computer users.
The major obstacle is that it is a big sample size if it is a small organization wanting to perform it.
Step-by-step explanation:
We need to calculate a sample size in order to have 95% confidence interval with 12 minutes of witdth.
So, we have that the difference between the upper limit and the lower limit is 12:


For a 95% CI, the value of z is 1.96. The standard deviation is 227.

The minimum sample size required is 5,499 computer users.