2 years ago

Is a biased sample valid

Mathematics

1 answer:

murzikaleks [220]2 years ago

5 0

No a biased sample is not valid

You might be interested in

Find the difference.<br> 3x^2y - x^2y

Murljashka [212]

Answer: 2x^2y

Step-by-step explanation:

Just subtraction.

The x is like a unit, There are 3 X's at first then subtract 1 x and you gor 2x.

Exponents will always stay the same unless there is division or multiplication involved

5 0

2 years ago

HELP RIGHT NOW!!! whats the answer!! thank you

Stels [109]

Answer:

Step-by-step explanation:

6 0

2 years ago

The area of a circle is 43.25cm2.<br> Find the length of the radius rounded to 2 DP.

Monica [59]

Answer:

3.71 cm

Step-by-step explanation:

Hi there!

Area of a circle equation: $A=\pi r^2$ where r is the radius

Plug in the area 43.25 cm²

$43.25=\pi r^2$

Divide both sides by π to isolate r²

$\frac{43.25}{\pi} =\frac{\pi r^2}{\pi} \\\frac{43.25}{\pi}=r^2$

Take the square root of both sides to isolate r

$\sqrt{\frac{43.25}{\pi}} =r\\3.71=r$

Therefore, the length of the radius rounded to 2 decimal points is 3.71 cm.

I hope this helps!

8 0

2 years ago

Please Help ! Dilations

Darina [25.2K]

Answer:

Answer is C.

Step-by-step explanation:

4 0

2 years ago

Baker's Service Station Charges $38 For An Oil Change. Last Week The Cost Of The Oil Change Was 20% Off. What Was The cost of th

Katena32 [7]

38 divided by .20. to get the answer

8 0

2 years ago