Answer:
a = 2
b = -1
7(2y^2 + (-1)y - 3) =
14y^2 - 7y -21
Step-by-step explanation:
The z score for a per - day expense of $400 is 0.65 while about 84.13% of the hotels is greater than $268
The z score is used to determine by how many standard deviations the raw score is above or below the mean. The z score is given by:
a) For an expense of $400:
The z score for a per - day expense of $400 is 0.65
b) For an expense greater than $268:
P(x > 268) = P(z > -1) = 1 - P(z < -1) = 1 - 0.1587 = 0.8413 = 84.13%
About 84.13% of the hotels is greater than $268
Find out more at: brainly.com/question/15016913
6. Expand the left side:
Recall the Pythagorean identity,
which leaves us with
Recall the angle sum formula for cosine:
which gets us to where we need to be:
and we're done.
7. A. The formulas you need are
This gives
7. B. Solving for gives
which holds for
where is any integer.
7. C. Factorize as
From here, we have
which hold for
where is any integer.