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2 years ago

Jordan spent $18. At the used bookstore.each book cost $0.45 how many books did Jordan buy?

Mathematics

1 answer:

madreJ [45]2 years ago

4 0

Answer: Jordan bought 40 books because 0.45 x 40 = 18

I hope that I was helpful ^^

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Suppose that you are conducting a survey on how many students have blue eyes in each first period classroom at Garfield Middle s

rusak2 [61]

Answer:

The correct statement is the first one: The number of blue-eyed students in Mr. Garcia's class is 2 standard deviations to the right of the mean

Explanation:

To calculate how many standard deviations a particular value in a group is from the mean, you can use the z-score:

$z-score=(x-\mu )/\sigma$

Where:

$z-score$ is the number of standard deviations the value of x is from the mean

$\mu$ is the mean

$\sigma$ is the standard deviation

Substitute in the formula:

$z-score=(10-6)/2=4/2=2$

Which means that the number of blue-eyed students in Mr. Garcia's class is 2 standard deviations above the mean.

Above the mean is the same that to the right of the mean, because the in the normal standard probability graph the central value is Z = 0 (the z-score of the mean value is 0), the positive values are to the right of the central value, and the negative values are to the left of the central value.

Therefore, the correct statement is the first one: The number of blue-eyed students in Mr. Garcia's class is 2 standard deviations to the right of the mean,

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4 years ago

Which answers choice shows that the set of irrational numbers is not closed under addition?

babunello [35]

Problably A !!!!!!!!!!!

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3 years ago

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What is the difference of 6 - 3 1/2

allsm [11]

Answer:

the answer is 2.5 or 2 1/2

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3 years ago

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Sebastian has 12 more trophies than megan. Megan has t trophies. How many trophies does sebastian have

lina2011 [118]

Answer:

t+12 trophies

Step-by-step explanation:

Since we cannot determine the value of t, the only thing we can do is write the expression t+12

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The manager of a music store has kept records of

Marysya12 [62]

Answer:

(a) $P(x\le 3) = 0.75$

(b) $P(x\le 3) = 0.75$

(b) is the same as (a)

(d) $P(x = 1\ or\ 2) = 0.55$

(e) $P(x > 2) = 0.45$

Step-by-step explanation:

Given

$\begin{array}{ccccccc}{CDs} & {1} & {2} & {3} & {4} & {5} & {6\ or\ more}\ \\ {Prob} & {0.30} & {0.25} & {0.20} & {0.15} & {0.05} & {0.05}\ \ \end{array}$