Determine whether the slope of the line is positive, negative, zero, or undefined.
A. positive
B. zero
C. undefined
D. negative
Answer: B
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Solve the problem.Jane has invited 50 people to a party and expects 
to attend. Express the expected number of guests n as an inequality and graph the values of n.
n = number of guests
A. 15 ? n ? 20
n = number of guests
B. n ? 30
n = number of guests
C. n ? 35
n = number of guests
D. 30 ? n ? 35
n = number of guests
The line graph shows the recorded hourly temperatures in degrees Fahrenheit at an airport. 
At what time was the temperature its lowest?
A. 6 p.m. B. 4 p.m. C. 9 a.m. D. 1 p.m.
Solve the system of equations. x - y + 3z = 5-4x + 4y - 12z = 1 x + 4y + z = 9
A. {(1, 0, 2)} B. ? C. {(0, 2, 1)} D. {(1, 2, 0)}
In the simplex tableau 
, what is the next pivot element?
A. 4 B. 6 C. 3 D. 10 E. none of these