Factor the following by removing a negative common factor.-9x2 - 27x + 45
A. -9x(x - 3 + 5)
B. -9(x2 - 3x + 5)
C. -9(x2 + 3x - 5)
D. -9(x2 - 3x)
Answer: C
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Obtain the Cartesian equation of the curve by eliminating the parameter.x = cos ?, y = -2 sin22?
A. y = 2x(1- x2)
B. y = -8x2(1- x2)
C. y = -2x2(1- x2)
D. y = -8x2
Solve the problem. Use ? = 3.14 when necessary.Three people build a rectangular building 8 m wide, 6 m long, and 7 m high. How many cubic meters does the shed contain?
A. 336 m3 B. 21 m3 C. 2688 m3 D. 146 m3
Translate into a system of equations. Do not solve.The sum of two numbers is -50. Five times the smaller number minus twice the larger number is -47. What are the numbers? (Let x represent the smaller number and y represent the larger number.)
A. 
B. 
C. 
D. 
Use Pascal's triangle to expand the binomial.(3x + 4)4
A. 324x4 + 1728 x3 + 864x2 + 3072x + 256 B. 81x3 + 432x2 + 864x + 768 C. 81x4 + 432x3 + 864x2 + 768x + 256 D. 81x4 + 256x4