Simplify the expression.eln x + ln y
A. exey
B. x+y
C. ln x + ln y
D. xy
Answer: D
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Solve the problem.The table shows the number of new cases (in thousands) of a certain disease diagnosed in a country in various years. 
Let f(t) be the number of new cases (in thousands) of the disease diagnosed at t years since 2010. Find a quadratic equation for f in vertex form. Use the data for the year 2013 to find the vertex and use the data for the year 2017 to find the value of a.
A. f(t) = 0.71(t - 4)2 + 39.3 B. f(t) = 0.4(t - 3)2 + 39.3 C. f(t) = 6.4(t - 3)2 + 39.3 D. f(t) = -0.23(t - 3)2 + 49.4
Solve.10y2 - x2 = 1xy = 3
A.
| No real number solution exists. |
B. (3, 1)
C. (-3, -1)
D. (3, 1), (-3, -1)
Solve the problem.In a Power Ball lottery, 5 numbers between 1 and 12 inclusive are drawn. These are the winning numbers. How many different selections are possible? Assume that the order in which the numbers are drawn is not important.
A. 792 B. 248,832 C. 95,040 D. 120
Add or subtract.-12 + 3
A. 15 B. -15 C. 9 D. -9