Solve.An experienced accountant can balance the books twice as fast as a new accountant. Working together it takes the accountants 4 hours. How long would it take the experienced accountant working alone?
A. 10 hr
B. 2 hr
C. 8 hr
D. 6 hr
Answer: D
Mathematics
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Solve.When making a telephone call using a calling card, a call lasting 3 minutes cost $1.00. A call lasting 11 minutes cost $2.60. 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 = -0.2x + 1.6 B. y = 0.2x + 0.4 C. y = 5x - 14 D. y = 0.2x - 8.4
Mathematics
Graph the complex number.-10
A. 
B. 
C. 
D. 
Mathematics
Solve the equation by factoring.2x2 - 7x - 4 = 0
A. x = 
or x = - 2
B. x = - 
or x = 2
C. x = - 
or x = 4
D. x = -2 or x = 4
Mathematics
?Function
is
.
?
Find 
.
??
A. 2
B. -81
C. -83
D. -2
E. 28
Mathematics