Answer:
<em>The sample may be a representative of the future of the future subjects, but the test results and confidence interval are suspect because it is not a random sample </em>
Step-by-step explanation:
When the subjects used for a research are not a random sample but friends whom share similar qualities/quantities related to the purpose of the experiment. The sample may be a representative of the future subjects, but the test results and confidence interval will not be reliable enough to be accepted as standard simply because it was not a random sample
Hence the comment <em>:The sample may be a representative of the future of the future subjects, but the test results and confidence interval are suspect because it is not a random sample </em>
Answer: a^2/b^2
Explanation: To raise a fraction to a power, raise the numerator and denominator to that power. Also known as, the properties of exponents.
The probability of selecting :
1- red marbles:
2- blue marbles
3- green marbles
4- purple marbles :
5- white marbles
good luck
Here we know that the initial velocity of the car is given by:
And the final velocity of the car is given by:
It took 3 seconds to attain the final velocity, so we have
Therefore, the acceleration can be obtained by:
Plugging the values of the initial, final velocity and the time, we get:
So the acceleration of the car is given by:
Now we need to find the direction of the average acceleration of the car:
Here, x and y are the coefficients of the 'x' and 'y' components of the vector:
Therefore, the direction of the average acceleration of the car is .
Answer:
(x +5)(x +6)
Step-by-step explanation:
You're looking for two factors of 30 that total 11.
30 = 1×30 = 2×15 = 3×10 = 5×6
5+6 = 11, so those are the numbers you want in the binomial factors.
x^2 +11x +30 = (x +5)(x +6)
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<em>Additional comment</em>
You will notice that ...
(x +a)(x +b) = x^2 +(a+b)x +ab
The constant is the product of the factor constants, and the x-coefficient is their sum.