Answer:
The expression is unclear so:
If the denominator is
then your set of existence is given by
since you want the quantity inside both square roots to be positive (and it happens for both to be simply
and you don't want a zero at the denominator so you have to rule out 1.
If the square root includes the whole denominator
the condition becomes 
where you don't include the extreme in the second condition since, again, you don't want to divide by 0. The answer in this case is simply
since values between 0 and 1 will give a negative root which is not a real number.
To figure out the average of Michael and Melissa we must add up all their test scores and divide the by 7; which is the number of tests they took.
Michael:
(80+76+73+70+40+25+10)/7
Melissa:
(88+83+75+70+60+65+62)/7
Michael's average is 53.4
Melissa's average is 71.9
So Melissa is earning a C in Latin.
Answer:
16. C
17. D
18. A
Step-by-step explanation:
<span>There are different coordinate systems the commonest being the system of latitudes, longitudes, and ellipsoidal heights, and the situation is complicated because the latitudes and longitudes of the same point differ slightly depending on the geodetic coordinate system of a nation,the result being that different system of latitude and longitude in use for the same point can disagree in coordinates sometimes by more than 200 meters.</span>
You should use a bar graph because that would work better