Find the indicated matrix.Let A = 
, B = 
, and C = 
. Find AB + BC.
A. 
B. 
C. 
D. 
Answer: D
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Sketch the graph of the equation. If the graph is a parabola, find its vertex. If the graph is a circle, find its center and radius.x = y2 + 10y + 23
A. vertex (-2, 5)
B. vertex (-2, -5)
C. vertex (2, -5)
D. vertex (-5, -2)
Simplify. Assume that all variables represent positive real numbers.
+ 3
+ 2
A. 28
B. 6
C. 29
D. 5
Factor the difference of squares.72x2 - 512y2
A. (24x - 64y)(3x + 8y) B. (3x - 8y)(24x + 64y) C. 8(3x - 8y)(3x + 8y) D. Does not factor
Solve the problem.A 12-ounce tube of shampoo costs $6.65. A 16-ounce tube of the same type of shampoo costs $9.44. Which is the best buy? Give the unit cost of the best buy to the nearest cent.
A. 12-ounce tube at $1.80 per ounce B. 12-ounce tube at $0.55 per ounce C. 16-ounce tube at $0.59 per ounce D. 16-ounce tube at $1.69 per ounce