Evaluate the expression for the given values. If necessary, round to the nearest tenth.
x = 9, y = 4
A. 
B. 
C. 
D. 
Answer: A
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Graph the given equation, indicating vertices, foci, and asymptotes (if it is a hyperbola).
+ 
= 1
A. 
Vertices: (±10, 0); Foci (±6, 0)
B. 
Vertices: (0, ±10); Foci (0, ±6)
C. 
Vertices: (±8, 0); Foci: (±10, 0)
D. 
Vertices: (0, ±10); Foci (±6, 0)
As part of a study on the metabolism of athletes, 400 college basketball players are randomly chosen and their weights taken. The distribution of the weights is approximately normal. The average weight is 215 pounds and the standard deviation is 15 pounds.Approximately how many players had weights with standardized values between 1 and 2?
A. 108 B. 216 C. 54 D. 200 E. none of these
Evaluate the expression for the given values. If necessary, round to the nearest tenth.
x = 8, y = 3
A. 
B. 
C. 2
D. 3
Express the sum or difference as a product.sin 
+ sin 
A. 2 sin 
sin x
B. 2 sin 
cos x
C. 2 cos 7x sin x
D. 2 sin 7x