All categories

3 years ago

4(x + 3) − 7 ≥ x + 3(x + 1)

Mathematics

1 answer:

Galina-37 [17]3 years ago

3 0

Answer:

The interval notation is

(-∞,∞)

Hope this helps!!

You might be interested in

Multiply 400 and 45.2 together. <br> Round to the nearest hundredth when necessary. <br> Answer:

Sveta_85 [38]

Answer:

18080.00

Step-by-step explanation:

hope this helps :)

8 0

3 years ago

Read 2 more answers

Suppose that a bike for $12 plus $ 1.60 per hour. What is the slope ?

frosja888 [35]

Answer:

Slope = 1.60

Step-by-step explanation:

y = 1.60x + 12

$12 - This would be the y-intercept

$1.60 - slope since it is the amount needed to pay each hour.

Hope this helps!

7 0

3 years ago

Which of the following is not an exterior angle of triangle BHE

anzhelika [568]

Answer:

I dont know

Step-by-step explanation:

7 0

3 years ago

A marketing researcher wants to find a 96% confidence interval for the mean amount those visitors spend per person per day while

ki77a [65]

Answer:

$n=(\frac{2.054(12)}{4})^2 =37.97 \approx 38$

So then the minimum sample to ensure the condition given is n= 38

Step-by-step explanation:

Notation

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

$\mu$ population mean (variable of interest)

$\sigma=12$ represent the population standard deviation

n represent the sample size

ME = 4 the margin of error desired

Solution to the problem

When we create a confidence interval for the mean the margin of error is given by this formula:

$ME=z_{\alpha/2}\frac{\sigma}{\sqrt{n}}$ (a)

And on this case we have that ME =4 and we are interested in order to find the value of n, if we solve n from equation (a) we got:

$n=(\frac{z_{\alpha/2} \sigma}{ME})^2$ (b)

The critical value for 96% of confidence interval now can be founded using the normal distribution. The significance is $\alpha=1-0.96 =0.04$ . And in excel we can use this formula to find it:"=-NORM.INV(0.02;0;1)", and we got $z_{\alpha/2}=2.054$ , replacing into formula (b) we got: