For the complex fraction, determine the LCD of all the fractions appearing within the expression.
A. x(x - 5)(x - 2)
B. x(x + 2)(x - 4)
C. (x + 2)(x - 4)
D. (x + 5)(x + 2)
Answer: C
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Solve the problem.Bob and Fred play the following game. Bob rolls a single die. If an even number results, Bob must pay Fred the number of dollars indicated by the number rolled. On the other hand, if an odd number is rolled, Fred must pay Bob the number of dollars indicated by the number rolled. Find Bob's expectation.
A. $0.40 B. -$0.25 C. $0.00 D. -$0.50
Solve the problem.An item is originally priced to sell for $55 and is marked down 20%. A customer has a coupon for an additional 5%. What is the total percent reduction for this item? Give the net decimal equivalent and total percent reduction.
A. 0.76; 24% B. 0.25; 75% C. 0.75; 25% D. 0.24; 76%
Solve.Two plumbers make house calls. One charges $90 for a visit plus $40 per hour of work. The other charges $70 per visit plus $50 per hour of work. For how many hours of work do the two plumbers charge the same?
A. 2 hr B. 2.5 hr C. 1.5 hr D. 1 hr
Identify the vertices and foci.
+ 
= 1
A. Vertices: (-2, 3), (8, 3); Foci: (-1, 3), (7, 3) B. Vertices: (3, -2), (3, 8); Foci: (3, 0), (3, 6) C. Vertices: (-2, 3), (8, 3); Foci: (0, 3), (6, 3) D. Vertices: (3, -2), (3, 8); Foci: (3, -1), (3, 7)