Answer: The correct answer is x^2=-4(y-1)
Step-by-step explanation:
Just took the test
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Answer with explanation:</u></h2>
Let be the average length of time it took the customers in the sample to check out .
As per given , we have
Since , the alternative hypothesis is right-tailed and population standard deviation is known , so we perform right-tailed t-test.
Also, we have n= 100
Sample mean =
Population standard deviation= s= 0.5
Test statistic :
P-value : P(z>2)=1-P(z<2)=1-0.9772=0.0228
[using p-value table for z]
Decision : Since p-value (0.0228) < significance level (0.05), so we reject the null hypothesis .
Conclusion : We have enough evidence to accept that the mean waiting time of all customers is significantly more than 3 minutes.
i.e. At a .05 level of significance, it can be concluded that the mean of the population is <u>more than 3 minutes.</u>
The answer is X=5
Explanation:
Answer:
Step-by-step explanation:
1.5x^2+6x+.... so that it can be rewritten in the form a(x+b)^2
Let .... be C
1.5x^2+6x+C
=1.5(x^2+4x+(C/1.5))
Compare above with 1.5(x+2)^2 = 1.5(x^2+4x+4)
C/1.5=4
C=6
So the expression should be 1.5x^2+6x+6
It can be rewritten to 1.5(x+2)^2
Answer:
Jillian is incorrect because square roots of perfect squares are rational.
Step-by-step explanation:
√25 = √(5²) = 5 - rational
25 is perfect square.