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3 years ago

6

mr. khans is buying a stapler for his office. each stapler costs $16.99. what does his final cost depend upon?

1 answer:

Bas_tet [7]3 years ago

5 0

It depends upon how many Staplers he buys

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explain to make a apple pie you need 2 pounds of apples how many pounds do i need to make 20 apple pies

Andrews [41]

You do 2x20 which is basically 2x2 (4) add a zero and your answer is 40

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2 years ago

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A model scale is 1 cm = 8m.<br> If the actual object is 40 meters, the model is<br> ____ cm long.

Dovator [93]

Answer:

Mmmmmmmmmmmmm.............

Step-by-step explanation:

MI no sabo amigo perdon

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2 years ago

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At a Psychology final exam, the scores are normally distributed with a mean 73 points and a standard deviation of 10.6 points. T

USPshnik [31]

Answer:

The score that separates the lower 5% of the class from the rest of the class is 55.6.

Step-by-step explanation:

Problems of normally distributed samples can be solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this question:

$\mu = 73, \sigma = 10.6$

Find the score that separates the lower 5% of the class from the rest of the class.

This score is the 5th percentile, which is X when Z has a pvalue of 0.05. So it is X when Z = -1.645.

$Z = \frac{X - \mu}{\sigma}$

$-1.645 = \frac{X - 73}{10.6}$

$X - 73 = -1.645*10.6$

$X = 55.6$

The score that separates the lower 5% of the class from the rest of the class is 55.6.

3 0

2 years ago

1. Find the common difference and find the 75th term of the arithmetic sequence: 3, 6, 9, 12, ....

Ymorist [56]

Answer:

$\boxed{225}$

.

Step-by-step explanation:

Arithmetic sequence

$Un = a + (n - 1)b$

.

First step, find its difference

$b = U_2 - U_1$

$b = 6 - 3$

$b = 3$

.

So, we get

$a = 3$

$b = 3$

.

Finally, Let's find the 75th term

$U_{75} = 3 + (75 - 1)3$

$U_{75} = 3 + (74)3$

$U_{75} = 3 + 222$

$U_{75} = 225$

4 0

2 years ago

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What is the solution to the system of equations below?

katen-ka-za [31]

$4x - y = - 5 \\ - 2x + y = 3$

Solve the second equation for y

$4x - y = - 5 \\ y = 3 + 2x$

Substitute the given value of y into the first equation

$4x - (3 + 2x) = - 5$

Solve the equation for x

$x = - 1$

Substitute the given value of x into the second equation

$y = 3 + 2( - 1)$

Solve the equation for y

$y = 1$

The possible solution of the system is the ordered pair (x,y)

$(x,y) = ( - 1, 1)$

7 0

2 years ago