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3 years ago

What is the answer to 3/8 plus 5/12

Mathematics

2 answers:

devlian [24]3 years ago

7 0

The answer is A 19/24 because if you do 3/8 + 5/12 =9/24 + 10/24= 19/23

FinnZ [79.3K]3 years ago

6 0

19/24, because 3/8 equals 9/24 and 5/12 equals 10/24. 10 plus 9 equals 19.

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Simplify 7(n - p) + 5p.<br><br> -7n - 12p<br> 7n - 12p<br> 7n - 2p

kramer

The answer is the 3rd one: 7n-2p

3 0

3 years ago

The number of hours worked per year per person in a state is normally distributed with a standard deviation of 39. A sample of 1

evablogger [386]

Answer:

The 98% confidence interval for the population mean number of hours worked per year per person is (2146, 2193).

Step-by-step explanation:

The question is incomplete.

The number of hours registered in the sample are:

2051 2061 2162 2167 2169 2171

2180 2183 2186 2195 2196 2198

2205 2210 2211

The sample mean can be calculated as:

$M=\dfrac{1}{n}\sum_{i=1}^n\,x_i\\\\\\M=\dfrac{1}{15}(2051+2061+2162+2167+2169+2171+2180+2183+2186+2195+2196+2198+2205+2210+2211)\\\\\\M=\dfrac{32545}{15}\\\\\\M=2169.67\\\\\\$

We have to calculate a 98% confidence interval for the mean.

The population standard deviation is know and is σ=39.

The sample mean is M=2169.67.

The sample size is N=15.

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

$\sigma_M=\dfrac{\sigma}{\sqrt{N}}=\dfrac{39}{\sqrt{15}}=\dfrac{39}{3.873}=10.07$

The z-value for a 98% confidence interval is z=2.326.

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

$MOE=z\cdot \sigma_M=2.326 \cdot 10.07=23.43$

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

$LL=M-t \cdot s_M = 2169.67-23.43=2146\\\\UL=M+t \cdot s_M = 2169.67+23.43=2193$

The 98% confidence interval for the population mean is (2146, 2193).

3 0

3 years ago

Express 1023.4567 correct to 3 significant figures

elena-14-01-66 [18.8K]

Answer:

1020

Step-by-step explanation:

well, the first three significant figures stops at the 102, so round the 1023.4567 to a whole number which just becomes 1023

then, round the answer so you only have the 102, so you would round down since 4 or less, which 3 is less than 4, you round down, and you would get 1020

that last 0 is not a significant figure because it does not have a decimal point or any other number following after it--any 0s at the end of a number are not significant if there is no decimal point or other number after them.

4 0

3 years ago

PLEASE HELP!!!!!!!! You develop an app to help students complete their homework. To earn money, you sell advertising space on th

tankabanditka [31]

Answer:

y=0.003*x+25

Step-by-step explanation:

0.003 is the slope of this linear function and 25 is its bias (aka y-intercept). The function is written as

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3 years ago

You are helping create goodie bags for a class party. You have bags Reeses and

Goshia [24]

Answer:

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3 years ago