Solve.7x + 7y + z = 1 x + 8y + 8z = 89x + y + 9z = 9
A. (0, 1, 0)
B. (-1, 1, 1)
C. (1, -1, 1)
D. (0, 0, 1)
Answer: D
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Find the focus and the directrix of the parabola.-2y2 - 12y - 14 - x = 0
A. Focus: 
; directrix: x = 
B. Focus: (-7, 4); directrix: x = -9
C. Focus: 
; directrix: y = 
D. Focus: 
; directrix: x = 
Solve.County records list a rectangular parcel of land as measuring 28,757 square yards. A surveyor measures the length of the parcel of land as 193 yards. What is the width of the parcel?
A. 142 yards B. 149 yards C. 28,564 yards D. 158 yards
Provide an appropriate response.Find two imaginary numbers whose product is -152.
What will be an ideal response?
A sample space has equally likely outcomes. X is one of the outcomes 
. How many outcomes are in the sample space?
What will be an ideal response?