Simplify the given expression.
z - 6z - 2z
A. 12z
B. 
z2
C. 
z
D. 12z2
Answer: C
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Sketch the graph of the equation in the rectangular coordinate system in three dimensions.3x - 6y + 9z = 18
What will be an ideal response?
A delivery truck must deliver packages to 6 different store locations (A, B, C, D, E, and F). The trip must start and end at A. The graph below shows the distances (in miles) between locations. We want to minimize the total distance traveled.
The repetitive nearest-neighbor tour starting with vertex A is given by:
A. A, D, F, E, C, B, A. B. A, E, F, C, B, D, A. C. A, C, D, B, E, F, A. D. A, B, C, D, E, F, A. E. none of these
Solve the problem.Given that the polar equation r = 
models the orbits of the planets about the sun, estimate the closest approach of a planet for which 
and 
to the sun.
A. 67 astronomical units B. 22 astronomical units C. 7 astronomical units D. 13 astronomical units
Solve the problem by using a nonlinear system.The sum of the squares of the digits of a positive two-digit number is 85, and the tens digit is 1 less than the units digit. Find the number.
A. 56 B. 67 C. 65 D. 76