Solve the problem.Find the equation for the tangent plane to the surface 
at the point 
A. x + y + z = 1
B. -7x - 7y + 9z = 5
C. x + y + z = 5
D. -7x - 7y + 9z = 1
Answer: B
Mathematics
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Find V1 with respect to point B.
a. +15 V
b. -15 V
c. +25 V
d. -25 V
e. +35 V
Mathematics
Find an equation of variation for the given situation.y varies directly as x and inversely as z , and y = 6 when x = 9 and 
A. y = 
B. y = 6xz
C. y = 8xz
D. y = 
Mathematics
Fill in the blank with one of the words or phrases listed below. 
An angle whose measure is between 90° and 180° is called a(n) 
angle.
A. adjacent B. angle C. obtuse D. acute
Mathematics
Find the sum of the sequence. 
A. - 
B. 
C. 
D. 
Mathematics