Answer:
Factor the following:
3 x^5 - 7 x^4
Factor x^4 out of 3 x^5 - 7 x^4:
Answer: x^4 (3 x - 7)
Step-by-step explanation:
Answer:
-19
Step-by-step explanation:
60/2-7²
30-49
-19
Answer:
In 300 draws Ellen should expect to draw a blue marble 120 times.
Step-by-step explanation:
Number of red marbles = 3
Number of blue marbles = 2
Total number of marbles =
Probability of drawing blue marbles =
=> = 0.4
Total number of draws = 300
So, in 300 draws Ellen should expect to draw a blue marble:
times.
And in case if red is needed, it becomes: times.
Answer:
The mean waiting time of all customers is significantly more than 3 minutes, at 0.05 significant level
Step-by-step explanation:
Step 1: State the hypothesis and identify the claim.
Step 2: We calculate the critical value. Since we were not given any significant level, we assume , and since this is a right tailed test, the critical value is z=1.65
Step 3: Calculate the test statistic.
Step 4:Decide. Since the test statistic , 2 s greater than the critical value, 1.65, and it is in the critical region, the decision is to reject the null hypothesis.
Step 5: Conclusion, there is enough evidence to support the claim that the mean is greater than 3