What does f(x) mean? In lineal functions

What is y divided by 2; y=4

shusha [124]

Y/2=?
y=4
4/2=2
so y divided by 2 is 2.
Have a nice day!!~~~ ^-^

4 0

3 years ago

A pool covers costs about $17.50 per square meter. Calculate the cost of covering the Children's pool.

Anit [1.1K]

First calculate the area of the pool, which is 15 x 15, = 225 sq meter,
and just multiply the cost for each sq meter by the area,
17.5 x 225
therefore the cost will be $3937.5

8 0

2 years ago

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the width of an architects desk is represented by four times x squared and the length is represented by the expression 2x cubed.

Alika [10]

You will use the formula A=lw to find the area. Substitute 2x^3 in for the length and 4x^2 for the width. You would multiply both of these. 2×4 = 8, and x cubed times x squared equals X to the fifth power. You will add the exponents together because the exponent tells you how many times to multiply that value. If there are three x multiplied together (in x cubes) and two x multiplied together(in x squared) that makes five x multiplied together. The answer is represented as A=8x^5. ^ means to the power of.

4 0

3 years ago

Need help on this question 8 only

erastova [34]

I hope this helps! let me know

8 0

3 years ago

a normal distribution with a mean of 25 minutes with a population standard deviation of 5 minutes. The store manager sampled 100

sergiy2304 [10]

Answer:

$z=\frac{24.25-25}{\frac{5}{\sqrt{100}}}=-1.5$

The p value for this case would be given with this probability:

$p_v =P(z$

For this case since the p value is higher than the significance level of 0.01 we have enough evidence to fail to reject the null hypothesis and we don't have enough evidence to conclude that the true mean is significantly less than 25 min.

Step-by-step explanation:

Information given

$\bar X=242.5$ represent the sample mean

$\sigma=5$ represent the population deviation

$n=100$ sample size

$\mu_o =25$ represent the value to check

$\alpha=0.01$ represent the significance level

z would represent the statistic

$p_v$ represent the p value

Hypotheis to test

We want to verify if the true mean is less than 25 min, the system of hypothesis would be:

Null hypothesis: $\mu \geq 25$

Alternative hypothesis: $\mu < 25$

The statistic would be given by:

$z=\frac{\bar X-\mu_o}{\frac{\sigma}{\sqrt{n}}}$ (1)

And replacing the info given we got:

$z=\frac{24.25-25}{\frac{5}{\sqrt{100}}}=-1.5$

The p value for this case would be given with this probability:

$p_v =P(z$

For this case since the p value is higher than the significance level of 0.01 we have enough evidence to fail to reject the null hypothesis and we don't have enough evidence to conclude that the true mean is significantly less than 25 min.

4 0

3 years ago