Find the center of the ellipse.2x2 + 5y2 - 12x + 70y + 253 = 0
A. (3, -7)
B. (-3, 7)
C. (7, -3)
D. (-7, 3)
Answer: A
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Identify all values for which the expression is undefined.
A. None B. 0 C. -6 D. 6, -6
Solve.The following table shows the daily evaporation and usage totals, in acre-feet, during a summer week at a certain dam. Use these data to answer the questions.DayDaily Evaporation (in acre-feet)Daily Usage (in acre-feet)Sunday61.4 203.3Monday59.7 201.7Tuesday60.1219.5Wednesday57.2229.6Thursday61.6200.7Friday65.3212.5Saturday59.8210.3(a) Find the mean daily evaporation.(b) Find the median daily evaporation.(c) Find the mean daily usage.(d) Find the median daily usage.
A. (a) 61.5 acre-feet, (b) 60.1 acre-feet, (c) 209.4, (d) 210.3 B. (a) 60.7 acre-feet, (b) 60.1 acre-feet, (c) 211.1, (d) 210.3 C. (a) 61.5 acre-feet, (b) 57.2 acre-feet, (c) 209.4, (d) 212.5 D. (a) 60.7 acre-feet, (b) 57.2 acre-feet, (c) 211.1, (d) 212.5
Solve.The Green County school system has 3031 high school students, 4238 middle school students, and 4646 elementary school students. How many total students are in the Green County school system?
A. 11,915 B. 11,875 C. 11,823 D. 11,970
Simplify.
A. 
B. 
C. 
D. 