How can my questions be marked brainliest

Mathematics

2 answers:

oksano4ka [1.4K]3 years ago

6 0

Answer:

Step-by-step explanation:

If you want to give brainliest, you have to wait for two answers then pick the best answer to get brainliest by clicking the little crown icon on the bottom right.

If you want to get brainliest, try to give a really good answer to a question and if the person asking thinks you gave the best answer,you will receive brainliest.

Agata [3.3K]3 years ago

6 0

Answer:

Questions are marked brainliest by whoever asked the question. That person chooses which answer they received is the most helpful/correct, and then awards that answer with the brainliest crown.

Step-by-step explanation:

You might be interested in

Please explain your answer thanks

allochka39001 [22]

Melissa is represented by variable m.
Josh is represented by variable j.
Chau is represented by variable c.

m+j+c= 148
c=4m
j=m+10

Substitute for c and j for the first equation.
m+(m+10)+4m=148
6m+10=148
6m=138
m=23

Plug the known m value in
j=23+10
j=33

c=4(23)
c=92

Final answer: Melissa=23 messages, Josh=33 messages, Chau=92 messages

6 0

3 years ago

The difference of two numbers is 6. find the smallest possible product.

nirvana33 [79]

The minimum product would be -9

8 0

4 years ago

If the confidence level is 90%, find the Margin of sampling error. The population is normally distributed, the sample size is 15

charle [14.2K]

Answer:

$ME = 1.761* \frac{5}{\sqrt{15}}=2.273$

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

$\bar X= 75$ represent the sample mean for the sample

$\mu$ population mean (variable of interest)

s=5 represent the sample standard deviation

n=15 represent the sample size

Solution to the problem

In order to calculate the critical value $t_{\alpha/2}$ we need to find first the degrees of freedom, given by:

$df=n-1=15-1=14$

Since the Confidence is 0.90 or 90%, the value of $\alpha=0.1$ and $\alpha/2 =0.05$ , and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-T.INV(0.05,14)".And we see that $t_{\alpha/2}=1.761$