Harry is trying to solve the equation y = 2x^2 − x − 6 using the quadratic formula. He has made an error in one of the steps bel
ow. Find the step where Harry went wrong.
1 answer:
You might be interested in
Answer:
And rounded up we have that n=656
Step-by-step explanation:
In order to find the critical value we need to take in count that we are finding the interval for a proportion, so on this case we need to use the z distribution. Since our interval is at 80% of confidence, our significance level would be given by and
. And the critical value would be given by:
Solution to the problem
The margin of error for the proportion interval is given by this formula:
(a)
Since we don't have prior info for the proportion of interest we can use as estimator. And on this case we have that
and we are interested in order to find the value of n, if we solve n from equation (a) we got:
(b)
And replacing into equation (b) the values from part a we got:
And rounded up we have that n=656
Answer:
d
-AKA-
The product of StartFraction 5 over 12 EndFraction and –420 should have been the value of x.
-AKA-
The product of 5/12 and –420 should have been the value of x.
Step-by-step explanation:
i did it on edge 2020
see..........
hope it helps :)
