All categories

3 years ago

|x−4| if x>4please help me!!please!!

Mathematics

1 answer:

Helen [10]3 years ago

8 0

Answer:

range of this function will he (0,∞)

i.e, all positve real number! ✌️:)

You might be interested in

Find the value of x and simplify completely

kondaur [170]

The value would be more than c

6 0

3 years ago

Give a 98% confidence interval for one population mean, given asample of 28 data points with sample mean 30.0 and sample standar

klio [65]

We have a sample of 28 data points. The sample mean is 30.0 and the sample standard deviation is 2.40. The confidence level required is 98%. Then, we calculate α by:

$\begin{gathered} 1-\alpha=0.98 \\ \alpha=0.02 \end{gathered}$

The confidence interval for the population mean, given the sample mean μ and the sample standard deviation σ, can be calculated as:

$CI(\mu)=\lbrack x-Z_{1-\frac{\alpha}{2}}\cdot\frac{\sigma}{\sqrt[]{n}},x+Z_{1-\frac{\alpha}{2}}\cdot\frac{\sigma}{\sqrt[]{n}}\rbrack$

Where n is the sample size, and Z is the z-score for 1 - α/2. Using the known values:

$CI(\mu)=\lbrack30.0-Z_{0.99}\cdot\frac{2.40}{\sqrt[]{28}},30.0+Z_{0.99}\cdot\frac{2.40}{\sqrt[]{28}}\rbrack$

Where (from tables):

$Z_{0.99}=2.33$

Finally, the interval at 98% confidence level is:

$CI(\mu)=\lbrack28.94,31.06\rbrack$

4 0

1 year ago

3x+1y=6 2x-1y=-1 plz helpllllllllll

Gwar [14]

Answer:

x=1 y=3

Step-by-step explanation:

3x+y=6 is the same as y=6-3x

2x-y=-1 is the same as y=2x+1

set them equal to each other

6-3x=2x+1

5x=5

x=1

substitute the value of x into either equation

y=2(1) +1

y=3

4 0

2 years ago

The base of a side of a ramp is 3 meters and the height os 0.6 Meters what us the area

Kobotan [32]

The answer would be

area = base x height divided by 2

3*0.6 = 1.8/2=0.9 square meters

5 0

3 years ago

Is the following number rational or irrational?

zubka84 [21]

Answer:

Step-by-step explanation:

Irrational as π is irrational.

7 0

2 years ago