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3 years ago

Answer the question for brainliest. If answered and explained well I’ll give brainliest

Mathematics

1 answer:

Step2247 [10]3 years ago

4 0

Answer:

Step-by-step explanation:

n₁=4

n₂=9

n₃=16

We can see that all three numbers are perfect squares of one higher than the figure number

So, n₁₅=(15+1)²=16₂=256

256≠225

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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

Someone tell me the answer

erastovalidia [21]

Answer:

a. sami eats 7/12 slices

b. the ratio of slice sami eats to lynn eats is 7:5

Step-by-step explanation:

7 0

2 years ago

Which is a true statement?

Murrr4er [49]

A) -2.8 > -3.5 is true. There are infinite solutions.
B) -7.75 < -8.45 is false. There is no solution.
C) 6.52 < 6.5 is is false. There is no solution.
D) -11.1 > 10.7 is false. There is no solution.

3 0

3 years ago

QUICK QUESTION! PLEASE ANSWER FAST!

mr_godi [17]

A^2 + B^2 = C^2
7^2 + B^2 = 25^2
49 + B^2 = 625
-49 -49
B^2 = 576
Square root both sides
B = 24

4 0

4 years ago

Read 2 more answers

Need help ASAP <br> i dont understand this someone help

jek_recluse [69]

Answer:

x=2

Step-by-step explanation:

Dilation of 3

6/3=2

6 0

3 years ago