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3 years ago

Solve the equation for the given variable a/2 + 4 = 6

Mathematics

1 answer:

Ber [7]3 years ago

4 0

Answer:

the answer is a=4

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PLEASE ANSWERRR!!!!!!

Fantom [35]

Answer:

Step-by-step explanation:

A function cannot have multiple y values for one x value.

Option A lists the y values of -8 and 10 for the x value of -4. Therefore this is not a function.

Option B lists 0, 5, 10, AND 15 all for -1. This can't be a function either.

Option C does not have two of the same x values for different results. Although both 0 and 9 give you the answer of 1 for the y value, this is perfectly okay in a function. This is your answer.

8 0

3 years ago

We wish to give a 90% confidence interval for the mean value of a normally distributed random variable. We obtain a simple rando

coldgirl [10]

Answer: $(9.27025,\ 11.12975)$

Step-by-step explanation:

Given : Sample size : n= 9

Degree of freedom = df =n-1 =8

Sample mean : $\overline{x}=10.2$

sample standard deviation : $s= 1.5$

Significance level ; $\alpha= 1-0.90=0.10$

Since population standard deviation is not given , so we use t- test.

Using t-distribution table , we have

Critical value = $t_{\alpha/2, df}=t_{0.05 , 8}=1.8595$

Confidence interval for the population mean :

$\overline{x}\pm t_{\alpha/2, df}\dfrac{s}{\sqrt{n}}$

90% confidence interval for the mean value will be :

$10.2\pm (1.8595)\dfrac{1.5}{\sqrt{9}}$

$10.2\pm (1.8595)\dfrac{1.5}{3}$

$10.2\pm (1.8595)(0.5)$

$10.2\pm (0.92975)$

$(10.2-0.92975,\ 10.2+0.92975)$

$(9.27025,\ 11.12975)$

Hence, the 90% confidence interval for the mean value= $(9.27025,\ 11.12975)$

6 0

3 years ago

Convert 120 km/h to feet per second with an explanation.

balu736 [363]

1m =3.28 feet 1km= 1000m 1km=3 280 feet

120x3 280=393 600feet/h 1h=3 600sec

393 600/3 600=109.33feet/sec

6 0

3 years ago

Which answer choice best describes the meaning of the expression?

pshichka [43]

J is the correct awnser.

8 0

3 years ago

Read 2 more answers

Mr. and Mrs. Smith's children all play different sports. They want to buy a combination training sets, which each cost $149, vol

faust18 [17]

How many kids does he have

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3 years ago