Simplify.
A. 
B. 4(a - 5b)
C. 4
D. 1
Answer: C
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Expand.(3x2 - y)5
A. 243x10 - 405x8y + 270x6y2 - 90x4y3 + 15x2y4 - y5 B. 243x10 + 405x8y + 270x6y2 + 90x4y3 + 15x2y4 + y5 C. 243x10 + 405x8y - 270x6y2 + 90x4y3 - 15x2y4 + y5 D. 243x10 - 405x8y - 270x6y2 - 90x4y3 - 15x2y4 - y5
Use the Gauss-Jordan method to solve the system of equations.9w + 7x - 5y - 3z = -208w + 5x - 8y - 3z = -289w + 7x + 6y + 4z = 17-5w - 3x + 7y + 9z = 18
A. (-1, 4, -5, 2) B. (2, 3, -4, -2) C. (2, -3, 4, -1) D. No solution
Use the Factor Theorem to determine whether x - c is a factor of f. If it is, write f in factored form, that is, write f in the form 
f(x) = x4 + 10x3 + 7x2 + 61x - 90; c = -10
A. Yes; f(x) = (x + 10)(x3 + 7x - 9) B. Yes; f(x) = (x + 10)(x3 + x - 9) C. No D. Yes; f(x) = (x - 10)(x3 + 7x + 9)
Approximate the length using the formula for arc length. Round to the nearest meter.A tree 490 m away subtends an angle of 2°. Find the height of the tree.
A. 34 m B. 37 m C. 14 m D. 17 m