Decide whether the pair of lines is parallel, perpendicular, or neither.3x - 4y = 38x + 6y = 14
A. parallel
B. perpendicular
C. neither
Answer: B
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Find all the first order partial derivatives for the following function.f(x, y, z) = ln (xy)z
A. 
= - 
; 
= - 
; 
= ln (xy)
B. 
= z ln 
; 
= zln
; 
= ln (xy)
C. 
= 
; 
= 
; 
= ln (xy)
D. 
= 
; 
= 
; 
= z ln (xy)z-1
A survey showed that students had these preferences for instructional materials. Use the graph to answer the question.
About how many students would you expect to prefer radio in a school of 650 students?
A. About 33 students B. About 5 students C. About 117 students D. About 234 students
Use the information given about the angle ?, 0 ? ? ? 2?, to find the exact value of the indicated trigonometric function.cos ? = - 
, csc ? < 0Find cos(2?).
A. 
B. 
C. - 
D. 
Draw a complete graph so that it has the given type of symmetry.origin
A. 
B. 
C. 
D. 