Solve the formula for the indicated variable.
+ 
= c for b
A. b = 
B. b = ac - 
C. b = 
D. b = 
- a
Answer: C
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Solve the problem.Find the points on the curve x2 - xy + y2 = 12 where the tangent is parallel to the 
A. (4, -2), (4, 2) B. (-2, -4), (2, 4) C. (-4, -2), (-2, 2), (2, -2), (4, 2) D. (-2, -4), (-2, 2), (2, -2), (2, 4)
Solve the problem.A weight attached to a spring is pulled down 4 inches below the equilibrium position. Assuming that the period of the system is 
second, determine a trigonometric model that gives the position of the weight at time t seconds.
A. y = -4cos 6?t
B. y = 4cos 
t
C. y = 4cos 6?t
D. y = -4cos 3?t
Solve the problem.A right triangle has one vertex on the graph of y = x2 at (x, y), another at the origin, and the third on the (positive) y-axis at (0, y). Express the area A of the triangle as a function of x.
What will be an ideal response?
Find the square.-(2y - 8)2
A. -4y2 - 64 B. 4y2 - 32y + 64 C. -4y2 + 32y + 64 D. -4y2 + 32y - 64