To solve the equation, it is necessary to isolate the unknown variable "x" first. This is done as shown below:
2x - 3 = 15
Adding 3 to both sides of the equation:
2x - 3 + 3 = 15 + 3
2x = 18
Dividing 2 from both sides:
2x/2 = 18/2
x = 9
Among the choices, the correct answer is B.
The z-value that corresponds to a two-tailed 95% confidence interval is z = +/- 1.96. Then the bounds of the confidence interval can be determined as:
Lower bound = mean - z*SD/sqrt(n) = 20 - 1.96*2/sqrt(100) = 20 - 0.12 = 19.88 hours
Upper bound = mean + z*SD/sqrt(n) = 20 + 1.96*2/sqrt(100) = 20 + 0.12 = 20.12 hours
So the first choice is the correct answer: 19.88-20.12 hours
Answer:
D
Step-by-step explanation:
Look to the six: it rounds up to ten. the nine becomes a ten, so the answer is 6.0
Answer:
Yes, the two expressions are equivalent
