Use an equation to solve the problem.Sales tax on a $13 compact disc is $0.91. At what rate is sales tax computed?
A. 6%
B. 7%
C. 8%
D. 2%
E. 3%
Answer: B
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Find an equation of variation if the following conditions exist.Suppose m varies directly as p and m = 63 when p = 7.
A. m = 
p
B. m = 56p
C. m = 70p
D. m = 9p
Determine if the argument is valid or invalid. Give a reason to justify answer.If it's Tuesday, then this must be Paris.Today is Wednesday. ? This must not be Paris.
A. Invalid by fallacy of the inverse B. Invalid by fallacy of the converse C. Valid by the law of syllogism D. Valid by the law of contraposition
Find the center, transverse axis, vertices, foci, and asymptotes of the hyperbola.
- 
= 1
A. center at (-4, -3)
transverse axis is parallel to x-axis
vertices at (-10, -3) and (2, -3)
foci at (-4 - 2
, -3) and (-4 + 2
, -3)
asymptotes of y + 3 = - 
(x + 4) and y + 3 = 
(x + 4)
B. center at (-4, -3)
transverse axis is parallel to y-axis
vertices at (-4, -7) and (-4, 1)
foci at (-4, -3 - 2
) and (-4, -3 + 2
)
asymptotes of y - 3 = - 
(x - 4) and y - 3 = 
(x - 4)
C. center at (-4, -3)
transverse axis is parallel to x-axis
vertices at (-8, -3) and (0, -3)
foci at (-4 - 2
, -3) and (-4 + 2
, -3)
asymptotes of y + 3 = - 
(x + 4) and y + 3 = 
(x + 4)
D. center at (-3, -4)
transverse axis is parallel to x-axis
vertices at (-7, -4) and (1, -4)
foci at (-3 - 2
, -4) and (-3 + 2
, -4)
asymptotes of y + 4 = - 
(x + 3) and y + 4 = 
(x + 3)
Determine if the following is an identity.1 + sec2x sin2x = sec2x
A. Identity B. Not an identity