She asked her friends, which does not represent a random sample.
She tried to show cause and effect without doing an experiment (which includes simple random sample, control group, treatment, etc).
So the answer is she did not use a random sample, and tried to show cause and effect with an observational study.
Answer:
x^3+9x^2-3x^2-3
Step-by-step explanation:
You can use a various of methods but when you use the box method you multiply each separately.
Like you would multiply x² by x, 8x by x, -3 by x (thats the first row)
x² by 1, 8x by 1, -3 by 1 ( for the second row)
Then you get those final variables and combine like terms getting the answer above
Answer:
10
Step-by-step explanation:
you derive the answer by taking the total length of the pipe (7 1/2 foot), divided by the length of each piece (3/4 foot).
7 1/2 ÷ 3/4 = <u><em>10</em></u>
Answer:
the answer is B.
Step-by-step explanation: i done the test have a nice day :))))
Answer:
<u><em>-2.</em></u>
Step-by-step explanation:
<em><u>4 x -2 = -8.</u></em>
