Answer:
To get the unit rate, simply divide the numerator by the denominator. The result indicates how many of the units in the numerator we can expect for every one of the units in the denominator.
Step-by-step explanation:
Now if
, then both
and
. Adding two positive numbers gives another positive number, so
. Why this is useful will be apparent shortly.
Back to the identity:
Factorizing the left hand side, we have
Now, any number squared will be positive, which means the right hand side is necessarily greater than 0.
We showed earlier that
. So we understand that we have
The only way to multiply a number by a positive number to get yet another positive number is to have the first number also be positive, which means
and from this it follows that
in the provided region.
0 solutions
move the x to one side, and the numbers to the other.
12x (-12x) + 32 (-32)= 12 (-12x) - 7 (-32)
12x - 12x = -7 - 32
0 = -39
0 ≠ -39
∴ you have 0 solutions
hope this helps
Answer:
The sampling method used is a stratified sampling method
Step-by-step explanation:
sampling is the selection of a predetermined representative subpopulation from a larger population, to estimate the characteristics of the whole population.
Stratified sampling: Here, the total population are divided into subcategories (strata) before sampling is done. The strata are formed based on some common characteristics. In our example, the times of the day (morning, afternoon and evening) has widely varying atmospheric conditions which will add biases to the measurement of air quality. For example, the air in the morning if compared to the afternoon in an industrial area may be purer because of minimal industrial activity, hence effective comparison will be made by stratification.
Answer:
277.5m²
Step-by-step explanation:
Just multiply.
