Kelly went on vacation to the Hamptons. She was curious about whether rich people own a lot of TVs, so she went door to door in 333 neighborhoods, asking people how many TVs they owned. Here's what she found: The inventor of the flat-screen TV lived in neighborhood AAA. He owned 787878 TVs. Every home in neighborhood BBB owned 333 TVs . TV ownership in neighborhood CCC was normally distributed with a median of 666 TVs. Which of the following is true? Choose all answers that apply: Choose all answers that apply: (Choice A) A The standard deviation for number of TVs in neighborhood BBB is abnormally low. (Choice B) B The interquartile range for TVs in neighborhood AAA is almost certainly the highest interquartile range among the 333 neighborhoods. (Choice C) C The mean number of TVs in neighborhood CCC is about twice as large as the mean number of TVs in neighborhood BBB. (Choice D) D The interquartile range and the standard deviation for number of TVs in neighborhood BBB are equal.

hello from mrbilldoesmath!

answer:

x - 3

discussion:

x^2 - 9 = (x-3) (x+3)   so

(x^2-9)/ (x + 3) = x-3

you,

mrb

probably .5

i can on others if necessary.

1. sometimes

2.   never

3   .08c = 7.50+.05c   250 pages

step-by-step explanation:

1.   sometimes

the theoretical probability of rolling a 1 is 1/6.   perhaps you got really lucky and never rolled a 1   in those 60 times.   your experimental probability is 0.   or perhaps you rolled a 1   20 times.   your experimental probability is 20/60 is 1/3.     it really just depends on how you rolled in that experiment.

2.   never

the probability of the event occurring is 1.   that is being 100 % sure it will happen.   that is the maximum amount of confidence we have.

3.   no customer card cost:   .08 times number of pages

customer card cost:   7.50 + .05 times number of pages

we want to find when it costs the same amount, so we will set these equal

let c = number of pages

.08c = 7.50+.05c

subtract .05c from each side

.08c-.05c = 7.5+.05c-.05c

.03c=7.5

divide each side by .03

.03c/.03 = 7.5/03

c =250  

the cost is the same at 250 pages

b) k’(6, 4); l’(3, 3)

step-by-step explanation:

a 270° clockwise rotation maps every point (x, y) to (y, -x). (it negates the x-coordinate and then switches it and the y-coordinate.)

this means the endpoints of the side congruent to kl, k' and l', would be mapped as:

k'(-4, 6)→(6, 4)

l'(-3, 3)→(3, 3)