Solve.When making a telephone call using a calling card, a call lasting 6 minutes cost $0.95. A call lasting 16 minutes cost $1.95. Let y be the cost of making a call lasting x minutes using a calling card. Write a linear equation that relates the cost of a making a call, y, to the time x.
A. y = 0.1x - 14.05
B. y = 10x - 
C. y = 0.1x + 0.35
D. y = -0.1x + 1.55
Answer: C
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Solve. If necessary, round percents to the nearest tenth, dollar amounts to the nearest cent, and all other numbers to the nearest whole.20% of the workers in a plant are female. If there are 1,170 workers altogether, how many workers are female?
A. 2 workers B. 5,850 workers C. 234 workers D. 936 workers
True or false?In Euclidean geometry, a straight line continues indefinitely far in either direction.
A. True B. False
Use a graphing calculator to determine which expression completes the identity.The expression 
is to be the left hand side of an equation that is an identity. Which one of the following four expressions can be used as the right hand side of the equation to complete the identity?
A. tan2x B. sec2x C. csc2x D. -cos2x
Determine the standard equation of the hyperbola with the given characteristics and sketch the graph.The foci are at (0, - 
) and (0, 
), and an asymptote has equation y = - 
x.
A. 
- 
= 1
B. 
- 
= 1
C. 
- 
= 1
D. 
- 
= 1