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4 years ago

What numbers come next in the pattern?? 1, -3, 9, -27

Mathematics

2 answers:

Gemiola [76]4 years ago

5 0

Answer:

81.

Step-by-step explanation: The pattern in this scenario would be multiplying the previous number by -3. (1 x -3 = -3, -3 x -3 x 9, etc.). Using this information, we know that multiplying the last number (27) by -3 would be the correct equation, yielding 81. Hope this helps!

grin007 [14]4 years ago

3 0

Answer:

Step-by-step explanation:

You r multiplying by three's

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Each year about 1500 students take the introductory statistics course at a large university. This year scores on the final exam

Luba_88 [7]

Answer:

a. Left Skewed

b. More students scored above 70

c. No

d. 0.0008

e. standard deviation increases by 1.4142

Step-by-step explanation:

a. The distribution is Left skewed. The maximum possible score is 100 and the mean is 70, hence, there is a barrier preventing a long right tail.

-The scores to the left is only 20, the left therefore is longer.

-The median, 74, is higher than the mean, 70, thus the mean is more left leaning.

b.More students will score more than 70.

-the median is 74 suggesting that 50% plus have scored 74points +

- Given the mean is 70 points, it's therefore obvious that more than 50% of the students have score more than 70 points.

c. No. This is not a normal distribution therefore we cannot calculate the probability that a randomly chosen student scored above 75 using this distribution.

d. The sample size n is large, n>30, so we can use the central limit theorem to approximate the probability:

$Standard \ Error=\frac{\sigma}{\sqrt{n}}\\\\=\frac{10}{\sqrt{40}}\\\\=1.5811\\\\z=\frac{75-70}{1.5811}\\\\=3.1623\\\\\\(PX>70)=P(z>3.1623)\\\\=0.0008\\$

e. The standard deviation will increase by the square root of the decreament :

$\sqrt{2}=1.4142$

#Standard deviation increases by 1.4142

3 0

4 years ago

Please solve the question below 2.0

Alexus [3.1K]

Answer:

The answer is B

Step-by-step explanation:

Just look at the picture

3 0

3 years ago

Which word or phrase fits in that sentence.<br><br> I put a ___ up that WAP

bagirrra123 [75]

Answer:

d***

Step-by-step explanation:

8 0

3 years ago

Which expression is equivalent to the following complex fraction?

ivanzaharov [21]

<h2>Answer:</h2>

The expression which is equivalent to the following complex fraction is:

$\dfrac{-2y+5x}{3x-2y}$

<h2>Step-by-step explanation:</h2>

We are given a expression in terms of two variables x and y as follows:

$\dfrac{\dfrac{-2}{x}+\dfrac{5}{y}}{\dfrac{3}{y}-\dfrac{2}{x}}$

Now, on taking least common multiple in the numerator as well as in the denominator we have:

$\dfrac{\dfrac{-2y+5x}{xy}}{\dfrac{3x-2y}{xy}}$

which on further simplifying is:

$\dfrac{-2y+5x}{3x-2y}$

5 0

3 years ago

Read 2 more answers

Raining Company analyzes its receivables to estimate bad debt expense. The accounts receivable balance is $200,000 and credit sa

8_murik_8 [283]

Answer:

Raining Company and Tanning Company

An Uncollectible Expense of $17,500 will be credited to the Allowance for Doubtful Accounts to bring the credit balance to $20,000.

Step-by-step explanation:

Since the accounts receivable balance is $200,000, there is nothing to do with the credit sales of $1,300,000.

The Allowance for Doubtful Accounts after adjustment should have a credit balance of $20,000 ($200,000 x 10%).

With a credit balance of $2,500 before adjustment, it will be adjusted (credited) with Uncollectible Expense of $17,500. This brings the adjusted balance to $20,000 which represents 10% of the accounts receivable balance of $200,000.

Note that the Allowance for Doubtful Accounts is a contra (credit) account to the Accounts Receivable account. This allowance is a way to prudently provide for credit risk as required by Generally Accepted Accounting Principles.

4 0

4 years ago