Answer:
A. x > 34/r
Step-by-step explanation:
To solve for the inequality, use inverse operations to isolate x. Begin by adding 15 to both sides and then divide by r.
rx - 15 > 19
rx > 34
x > 34/r
Let x be the unknown number. One fifth of this number is x/5, one fourth of this number is x/4. So, we have
We know that this difference equals 9, so we have
Multiply both sides by 20 to get
Answer:
The 90% confidence interval for the population standard deviation waiting time for an oil change is (3.9, 6.3).
Step-by-step explanation:
The (1 - <em>α</em>)% confidence interval for the population standard deviation is:
The information provided is:
<em>n</em> = 26
<em>s</em> = 4.8 minutes
Confidence level = 90%
Compute the critical values of Chi-square as follows:
*Use a Chi-square table.
Compute the 90% confidence interval for the population standard deviation waiting time for an oil change as follows:
Thus, the 90% confidence interval for the population standard deviation waiting time for an oil change is (3.9, 6.3).
Answer:
k(x)=5x+2
k(4)=5(4) +2 =22
k(1)= 5(1) +2 =7
k(4) - k(1) = 22 - 7 = 15
The answer is:
A). 15
Answer:
the second one
Step-by-step explanation: