Solve by the substitution method.
= 56x = 10 + 12y
A. 
B. ?
C. 
D. {(x, y)|
= 5}
Answer: C
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Solve the problem.Find symmetric equations for the line through the point P(4, -4, -4) parallel to the vector 
.
A. 
= 
= 
B. 
= 
= 
C. 
= 
= 
D. 
= 
= 
Find the intercepts of the circle. Round to the nearest hundredth, when necessary.81x2 + 81y2 - 36x - 108y - 417 = 0
A. There are no intercepts. B. The x-intercept is x ? 40.87, and the y-intercept is y ? 39.71. C. The two x-intercepts are x ? 2.5 and x ? -2.06, and the two y-intercepts are y ? 3.03 and y ? -1.7. D. The two x-intercepts are x ? 4.78 and x ? -4.34, and the two y-intercepts are y ? 5.4 and y ? -4.06.
Divide, if possible. If not possible, write "not defined."
A. 0 B. Not defined C. 1 D. 61
Refer to this figure to decide whether the statement is true or false. 
Lines DE and KL are parallel.
A. True B. False