Simplify the expression.
A. tan x
B. cot x
C. csc x
D. -cot x
Answer: B
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Decide whether the point 
is a feasible solution for the constraints.
?
?
Answer yes or no.
What will be an ideal response?
Solve using elimination.
A. x = 
, y = ; x = -
, y =
; x = ,
, y = - 
; x = - 
, y = - 
or (
, 
), (- 
, 
), (
, - 
), (- 
, - 
)
B. x = - 
, y = 
; x = - 
, y = - 
or (- 
, 
), (- 
, - 
)
C. x = 
, y = 
; x = - 
, y = 
; x = ,
, y = - 
; x = - 
, y = - 
or (
, 
), (- 
, 
), (
, - 
), (- 
, - 
)
D. x = 
, y = 
; x = ,
, y = - 
;
or (
, 
), (
, - 
)
Solve the problem.A certain stock is worth x dollars per share at the beginning of a recent month. By the end of the first week of that month, the stock's value doubled, then decreased by 5 points ($5 per share). Express, in symbolic form, the total value, V, of your stock at the end of the week if you own 40 shares.
A. V = 80x - 5 B. V = 40(x - 5) C. V = 2x - 5 D. V = 40(2x - 5)
Solve the equation using the quadratic formula (when necessary, round results to three significant digits).
A. -1.23, 1.90 B. -1.10, 1.83 C. -1.10, 1.90 D. -1.23 , 1.83 E. -1.23