Find the center of the ellipse.
+ 
= 1
A. (25, 4)
B. (4, 0)
C. (0, -4)
D. (-4, 0)
Answer: D
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Solve the problem.Barnes and Able sell life, health, and auto insurance. Sales for May and June are given in the matrices. Life Health AutoM = 
J = 
Find the matrix that would give total sales.
A. 
B. 
C. 
D. 
Solve the problem.The cost of tiling the floor in a rectangular room varies jointly as the width and length of the room. If a room with width 9 feet and length 12 feet costs $160.92 to tile, find the cost to tile the floor of a room with width 14 feet and length 23 feet.
A. $479.78 B. $485.04 C. $469.96 D. $480.85
Perform the indicated operations and simplify the result. Leave the answer in factored form.
- 
A. 
B. 0
C. 9x
D. 
Fifty percent of students enrolled in an astronomy class have previously taken physics. Thirty percent of these students received an A for the astronomy class, whereas twenty percent of the other students received an A for astronomy.Find the probability that a student selected at random previously took a physics course and did not receive an A in the astronomy course.
A. 0.35 B. 0.40 C. 0.15 D. 0.10 E. none of these