Identify the equation without applying a rotation of axes.x2 + 10xy + 25y2 - 3x - 2y + 7 = 0
A. ellipse
B. hyperbola
C. parabola
D. not a conic
Answer: C
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Solve the problem.A pendulum is released and swings until it stops. If it passes through an arc of 35 inches the first pass, and if on each successive pass it travels 
the distance of the preceding pass, how far will it travel before stopping?
A. 8.75 in. B. 52.5 in. C. 43.75 in. D. 78.75 in.
Solve the problem.Find the least squares line through the points 
and 
A. y = 33x + 56 B. y = -3x + 16 C. y = -3x + 56 D. y = 33x + 16
Solve the problem.How many different amounts of money can you pay if you use five coins including quarters and dimes?
A. 4 B. 5 C. 6 D. 7
Use sum-to-product identities to rewrite the expression as a product.cos 7? - cos 3?
A. -2 sin 5x sin 2x B. -2 cos 5x sin 2x C. 2 cos 2x D. 2 cos 5x cos 2x