Solve the system by substitution.4x + 4y = 35x + 5y = 10
A. {(x, y) | 4x + 4y = 3}
B. {(4, 5)}
C. ?
D. {(1, 1)}
Answer: C
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Find the equation for the plane tangent to the parametrized surface S at the point P.S is the sphere r(?, ?) = 3 cos ? sin ?i + 3 sin ? sin ?j + 3 cos ?k; P is the point corresponding to 
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What will be an ideal response?
Give a geometric description of the set of points whose coordinates satisfy the given conditions. x2 + y2 + z2 > 64
A. All points outside the cylinder with radius 8 B. All points outside the sphere of radius 8 C. All points on the surface of the cylinder with radius 8 D. All points in space
Construct a truth table to determine when the lightbulb is on. That is, determine which switches must be open and which switches must be closed for the lightbulb to be on. 
A. The lightbulb will be on in all cases except when p, q, and r are all open.
B. The lightbulb will be on when p and r are closed and q is open.
C. The lightbulb will be on when p, q, and r are all closed.
D. The lightbulb will be on in all cases except when p and r are open and q is closed.
Find the required inverse and locate on the number line.Find the multiplicative inverse for - 5 and graph on the number line. 
A. 
B. 
C. 
D. 