Simplify, if possible. If the answer is undefined, state so.
A. 54
B. Undefined
C. -375
D. -3
Answer: D
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Solve the application problem.Mark started his morning walk by going uphill for 5 minutes. Then for the next 5 minutes, he walked downhill to an elevation lower than his starting point. For the next 10 minutes, he walked on level ground. For the final 10 minutes, he walked uphill. Which graph matches the description of Mark's walk?
A. 
B. 
C. 
D. 
Use the discriminant to determine whether the quadratic equation has two unequal real solutions, a repeated real solution, or no real solution without solving the equation.x2 + 6x - 7 = 0
A. no real solution B. repeated real solution C. two unequal real solutions
Simplify the complex rational expression.
A. 
B. - 
C. - 
D. - 
Add or subtract.(4 - 5i) + (6 + 9i)
A. -2 + 14i B. 10 + 4i C. -10 - 4i D. 10 - 4i