Solve the problem.Frank can type a report in 7 hr. James can type it in 6 hr . How long will it take the two of them working together?
A. 
hr
B. 
hr
C. 3
hr
D. 42 hr
Answer: C
Mathematics
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Solve the proportion.- 
= 
A. {-48}
B. {-16}
C. 
D. 
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Multiply.
A. 69,590 B. 80,590 C. 70,590 D. 71,590
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Plot the complex number.z = -2 - i
A. 
B. 
C. 
D. 
Mathematics
Find the vertex of the parabola and determine if it is a maximum or minimum. f(x) = -2x2 - 8x - 7
A. (-2, 1); maximum B. (-2, 1); minimum C. (-2, -1); maximum D. (-2, -1); minimum
Mathematics