Answer:
A. Selection Bias
Step-by-step explanation:
Selection bias is the bias introduced by the selection of individuals, groups, or data for analysis in such a way that proper randomization is not achieved, thereby ensuring that the sample obtained is not representative of the population intended to be analyzed. This is represented by choosing the students without glasses.
Answer:
10000
Step-by-step explanation:
Answer:
y = 3
x = - 3
Step-by-step explanation:
First we represent "x" through "y"
y = x + 6
x = y - 6
Then we substatute this value instead of "x" in the other formula, and so we get...
y = - 2x - 3
y = - 2(y - 6) - 3
y = - 2y + 12 - 3
3y = 9
y = 3
Now that we know "y" we can find out "x" by doing...
x = y -6
x = 3 - 6
x = - 3
The answer is 6240 + 5t < 8000.
The 6240 represents the combined weight of the horses, regardless of how much they carry, so this will remain constant and without a variable. There are 5 horses, and it unknown how much weight they will carry, so this is represented as 5t. This total must be less that 8000 pounds, as this is the most the trailer can transport.
Hope this works!