Solve the problem.Median family income in Country X between 1990 and 1999 can be modeled by  where x is the year. Determine symbolically when the median income was $42,216.

A. x ? 1998
B. x ? 2000
C. x ? 1994
D. x ? 1996


Answer: D

Mathematics

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Let A = {1, 3, 5, 7}, B = {5, 6, 7, 8}, C = {5, 8}, D = {2, 5, 8}, and U = {1, 2, 3, 4, 5, 6, 7, 8}. Decide if the set relationship is true or false.A ? {7, 5, 3, 1}

A. True B. False

Mathematics

Graph the solution set of the system of inequalities or indicate that the system has no solution.

A.

B.

C.

D.

Mathematics

Solve the system of equations using substitution.

A. x = 3, y =  or (3)
B. x = , y = 3 or (, 3)
C. x = , y = 9 or (, 9)
D. x = 9, y =  or (9, )

Mathematics

Rationalize the denominator. Assume all variables have positive values.

A.  
B. 21 
C. 310
D.  

Mathematics