Every thing is pretty self explanatory. for 15 please have complete sentence please?? thanks!

Mathematics

1 answer:

lukranit [14]3 years ago

7 0

9. Let p = Pico

3/4p = 18

10. Let h = height with pedestal and foundation

151 + h = 305

11. Let m = Meredith

19 = 3 + 2m

12. Let p = number of pizzas, $5 off is - 5 from regular price

3p - 5 = 21.75

13. Option C.

14. Option A.

15. Let w = last week's miles

w = $\frac{1}{2}$ (12) + 3

The word "half" tells you to use 1/2 in the equation. The phrase "three more than" tells you to use + 3. We multiply 1/2 by 12 (or divide 12 by 2; it's the same thing) because we are taking half of the miles Carmen ran "this week" as stated in the problem.

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Susan has been on a bowling team for 14 years. After examining all of her scores over that period of time, she finds that they f

elixir [45]

Answer:

Step-by-step explanation:

Let X be the random variable that represents a score of Susan. We know that X has a normal distribution with average score of 225 and a standard deviation of 13. For n = 16 games, the average score $\bar{X}$ has a normal distribution with mean of 225 and a standard deviation of $13/\sqrt{16}=13/4=3.25$ . Besides, the z-score related to 220 is (220-225)/3.25=-1.5385, and the z-score related to 228 is (228-225)/3.25= 0.9231. Therefore, we are looking the probability $P(220 < \bar{X} < 228) = P(-1.5385 < Z < 0.9231) = P(Z < 0.9231) - P(Z < -1.5385)$ = 0.76