Solve the problem.If tan ? = -0.4, find the value of tan ? + tan (? + ?) + tan (? + 2?).
A. -1.2 + 3?
B. 0.8
C. -1.2
D. undefined
Answer: C
Mathematics
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Solve the equation. Express radicals in simplest form.2x2 = 30
A. {16}
B. {15}
C. {-
, 
}
D. {-15, 15}
Mathematics
Find v ? u.v = 
and u = 
A. 0
B. 
C. 
i - 
j
D. 
i - 
j
Mathematics
Find the center of the hyperbola.
- 
= 1
A. (2, 5) B. (0, 0) C. (5, 0) D. (0, 2)
Mathematics
Solve the problem.The number of people present at a stadium holding a big rock concert can be estimated with the following function: 
where y is the number of people present and x is the amount of time since 
on the day of the concert. Rewrite the model with x equal to the amount of time since 1.00 p.m.
A. y = 13,252(x + 2)0.74 + 0.54(x + 2) + 102
B. y = 13,252(x + 2)0.74 + 0.54x + 102
C. 
D. y = 13,252(x - 2)0.74 + 0.54x + 102
Mathematics