Add or subtract. Simplify by combining like radical terms, if possible. Assume all variables and radicands represent positive real numbers.4 
+ 3 
A. 12 
B. 7 
C. 4 
+ 3 
D. 7 
Answer: C
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Use the total differential dz to approximate the change in z as (x, y) moves from P to Q. Then use a calculator to find the corresponding exact change ?z (to the accuracy of your calculator).4x3y2; P(1, 1), Q(1.01, 0.99)
A. dz = 0.04; ?z = 0.0381920404 B. dz = 0.04; ?z = 0.0391920404 C. dz = 0.03; ?z = 0.0391920404 D. dz = 0.04; ?z = 0.0416920404
Multiply.(6x - 1)(x2 - 4x + 1)
A. 6x3 + 25x2 - 10x + 1 B. 6x3 - 25x2 + 10x - 1 C. 6x3 - 24x2 + 6x + 1 D. 6x3 - 23x2 + 2x - 1
Solve the problem.Andy has 28 coins made up of quarters and half dollars, and their total value is $10.75. How many quarters does he have?
A. 15 quarters B. 13 quarters C. 18 quarters D. 17 quarters
Find the center (h, k) and the radius r of the circle.x2 + y2 + 2x - 8y - 8 = 0
A. (h, k) = (4, -1), r = 5 B. (h, k) = (1, -4), r = 25 C. (h, k) = (-1, 4), r = 5 D. (h, k) = (-4, 1), r = 25