Use the quadratic formula to solve the quadratic equation.x2 = -4x + 21
A. x = -7, 3
B. x = -7, - 3
C. x = 7, - 3
D. x = -21, 0
Answer: A
Mathematics
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A. 
?
B. 
?
C. 
?
D. 
?
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Solve the equation.
- 
= 
A. z = -4 B. ? C. z = 5 D. z = 4
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Find the slope of the line through the given pair of points, if possible. Based on the slope, indicate whether the line through the points rises from left to right, falls from left to right, is horizontal, or is vertical.
and 
A. 
; rises
B. 
; rises
C. 
; falls
D. 
; rises
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Solve the inequality. Graph the solution set and write the solution set in set-builder notation.x2 - 4x ? -3
A. {x 
B. {x 
C. {x 
D. {x 
Mathematics