(x+y-3)(x+y+3) = x^2+xy+3x+xy+y^2+3y-3x-3y-9 = -9+x^2+y^2+2xy
<span>For the answer to the question above, the numbers of pages in the books in a library follow a normal distribution. If the mean number of pages is 180 and the standard deviation is 30 pages, you can conclude that about 16% of the books have fewer than 150 pages. I hope this helps</span>
Answer:
the best point estimate to use as an estimate of the true mean tip per delivery would be $1.88
the distribution that will be used to obtain the critical value is that you should try to find the population standard deviation and then find out what 90% of that is
i cannot do parts c and d i'm sorry
Step-by-step explanation:
Rounded to the nearest tenth place would be: 1.0
Hope it helps!
