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3 years ago

Need help with these last 3.

Mathematics

2 answers:

iren2701 [21]3 years ago

8 0

Answer:

Answers are 18, 78, -18.

Leto [7]3 years ago

7 0

Answer= 18 ,78 ,-18
hope this helps :)

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At a party, the cheese pizza is cut into 15 slices and the veggie pizza is cut into 6 slices. If the host wants to serve identic

givi [52]

Answer:

2.5 platters

Step-by-step explanation:

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3 years ago

Does anybody know how to do this? It’s due tomorrow! I need help really bad

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Answer:

I don't actually know

Step-by-step explanation:

Just ask someone

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2 years ago

Read 2 more answers

Type the correct answer in the box. Use numerals instead of words. If necessary, use / for the fraction bar. If (x + 2) is a fac

vitfil [10]

If x+2 is a factor of x^3+6x^2+kx+10, then if we replace x by -2 in the polynomial x^3-6x^2+kx+10, we must get zero:
x=-2→(-2)^3-6(-2)^2+k(-2)+10=0→
-8-6(4)-2k+10=0→
-8-24-2k+10=0
-2k-22=0
Solving for k. Adding 22 both sides of the equation:
-2k-22+22=0+22
-2k=22
Dividing both sides of the equation by -2:
-2k/(-2)=22/(-2)
k=-11

Answer: k = - 11

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4 years ago

US consumers are increasingly using debit cards as a substitute for cash and checks. From a sample of 100 consumers, the average

scoray [572]

Answer:

A. Margin of error = 128.79

B. The 99% confidence interval for the population mean is (7661.21, 7918.79).

Step-by-step explanation:

We have to calculate a 99% confidence interval for the mean.

The population standard deviation is know and is σ=500.

The sample mean is M=7790.

The sample size is N=100.

As σ is known, the standard error of the mean (σM) is calculated as:

$\sigma_M=\dfrac{\sigma}{\sqrt{N}}=\dfrac{500}{\sqrt{100}}=\dfrac{500}{10}=50$

The z-value for a 99% confidence interval is z=2.576.

The margin of error (MOE) can be calculated as:

$MOE=z\cdot \sigma_M=2.576 \cdot 50=128.79$

Then, the lower and upper bounds of the confidence interval are:

$LL=M-t \cdot s_M = 7790-128.79=7661.21\\\\UL=M+t \cdot s_M = 7790+128.79=7918.79$

The 99% confidence interval for the population mean is (7661.21, 7918.79).

8 0

3 years ago

QUESTION 3 I [12] A student must answer a multiple-choice question with five possible answers. He knows the correct answer with

wel

The probability that the student does not know the answer but he randomly guesses it is 0.146025

<h3>How to solve for the probability of having a correct guess</h3>

The question has only one right answer out of 5 choices.

Probability he answers incorrectly:

1 - 0.55 * 4/5

= 0.45 * 0.8

= 0.36

Probability he does not know answer but answers the question correctly

$\frac{(1-0.55)\frac{1}{5} }{0.55+(1-0.55)\frac{1}{5} }$

= 0.09/0.55+0.09

= 0.140625

Read more on probability here: brainly.com/question/24756209

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2 years ago