Evaluate the expression for the given replacement values.x - z for x = 5.7, z = 0.73
A. 4.87
B. 4.97
C. 6.43
D. -4.97
Answer: B
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Give a geometric description of the set of points whose coordinates satisfy the given conditions.x2 + y2 ? 1, z = -2
A. All points within the parabola x2 + y2 = 1 in the plane z = -2 B. All points on the cylinder with radius 1 along the z-axis C. All points on or outside of the circle x2 + y2 = 1 and in the plane z = -2 D. All points on or within the circle x2 + y2 = 1 and in the plane z = -2
Find the derivative of y.y = sech (-2?) (1 - ln sech(-2?))
A. sech (-2?) tanh (-2?) ln sech (-2?) B. 1 + 2 sech (-2?) tanh (-2?) ln sech (-2?) C. -2 sech (-2?) tanh (-2?) ln (-2?) D. -2 sech (-2?) tanh (-2?) ln sech (-2?)
Solve the problem.Aaron's map shows that he needs to drive 110 more kilometers to reach his destination. Approximately how many more miles must he drive? Use the formula 
where k is the number of kilometers. (Round to the nearest tenth of a mile.)
A. 177.1 miles B. 63.4 miles C. 79.7 miles D. 68.2 miles
Simplify the complex rational expression using Method I or Method II.
A. 
B. x + 8
C. 
D. x - 8