A coin is tossed seven times and the sequence of heads and tails is observed. What is the number of different outcomes having exactly three heads?
A. 210
B. 21
C. 10
D. 35
E. none of these
Answer: D
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Find the slope and the y-intercept of the line.5x - 2y + 9 = 0
A. Slope: - 
; y-intercept: 
B. Slope: 
; y-intercept: 
C. Slope: - 
; y-intercept: 
D. Slope: 
; y-intercept: 
Solve the radical equation. Check all proposed solutions.
= 5
A. x = 25
B. x = 5
C. x = 
D. x = 
Find the amount or rate of discount and the sale price. Round money amounts to the nearest cent.Original price: $151 Rate of discount: 10%
A. $15.10, $135.90 B. $7.55, $143.45 C. $16.61, $134.39 D. $13.59, $137.41
Find the foci and endpoints of each axis for the given ellipse.
+ y2 = 1
A. Foci: (± 63, 0); vertices: (± 64 , 0);
endpoints of the minor axis: (0, ± 1)
B. Foci: (±
, 0); vertices: (± 8, 0);
endpoints of the minor axis: (0, ± 1)
C. Foci: (0 , ±
); vertices: (± 8, 0);
endpoints of the minor axis: (± 1, 0)
D. Foci: (±
, 0); vertices: (± 10 , 0);
endpoints of the minor axis: (0, ± 1)