Solve the equation.
+ 
= 
A. {8, 0}
B. {1, 0}
C. {-8, 0}
D. {-1, 0}
Answer: B
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Find, if possible, the number of elements in sets A, B, and C using the given information.n(A - C) = 10n(C - A) = 2n(A ? C) = 22n(A ? B) = 10n((C ? A) - B) = 4n((A ? B) - C) = 4n(B - (A ? C)) = 3n(B ? C) = 7
A. n(A) = 20, n(B) = 14, n(C) = 12 B. n(A) = 16, n(B) = 18, n(C) = 12 C. n(A) = 12, n(B) = 25, n(C) = 20 D. The information is inconsistent or incomplete.
Solve the problem.An object is propelled vertically upward from the top of a 224-foot building. The quadratic function 
models the ball's height above the ground, 
in feet, t seconds after it was thrown. How many seconds does it take until the object finally hits the ground? Round to the nearest tenth of a second if necessary.
A. 2.0 sec B. 7.0 sec C. 2 sec D. 2.5 sec
Plot the given point in the rectangular coordinate system.(1, -5)
A. 
B. 
C. 
D. 
Evaluate the radical expressions or indicate that the root is not a real number.
A. 64 B. -4 C. 4 D. not a real number