Translate the problem to a system of equations, then solve using Cramer's Rule.The sum of a student's three scores is 218. If the first is 22 points more than the second, and the sum of the first two is 14 more than twice the third, what was the first score?
A. 46
B. 68
C. 86
D. 64
Answer: C
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Compare the right-hand and left-hand derivatives to determine whether or not the function is differentiable at the point whose coordinates are given.
y = xy = 2x
A. Since limx?0+ f '(x) = 1 while limx?0- f '(x) = 2, f(x) is not differentiable at x = 0. B. Since limx?0+ f '(x) = 2 while limx?0- f '(x) = 1, f(x) is not differentiable at x = 0. C. Since limx?0+ f '(x) = -2 while limx?0- f '(x) = -1, f(x) is not differentiable at x = 0. D. Since limx?0+ f '(x) = 1 while limx?0- f '(x) = 1, f(x) is differentiable at x = 0.
Add or subtract. Simplify your answer to lowest terms.
+ 
A. 
B. 4
C. 
D. 
Solve the problem.Find an equation for the level curve of the function f(x, y) = 
that passes through the point 
.
A. 
= 
B. x = 2y
C. 
? 
D. 
= 2
Use the vertical line test to determine whether the graph represents a function.
A. function B. not a function