Apply the distributive property.5x(9 - x)
A. -5x2 - 45x
B. -5x2 + 45x
C. 5x2 + 45x
D. 5x2 - 45x
Answer: B
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Using the horizontal-line test, determine whether the function is one-to-one.
A. one-to-one B. not one-to-one
Solve the following system by any appropriate method. If there is no real number solution, so state.x2 + 4y2 = 4x2 - 4y2 = 6
A. (
, 1), (
, -1)
B. (
, 1), (-
, -1)
C. (
, 1), (
, -1), (-
, 1), (-
, -1)
D. no solution
In business, equipment is often depreciated using the double declining-balance method. In this method, a piece of equipment with a life expectancy of N years, costing $C, will depreciate to a value of $V in n years, where n is given by the formula
?
?
A word processor worth $470 when new had a life expectancy of 10 years. If it is now worth $130, how old is it? Round to the nearest tenth.
?
A. 2.8 years old B. 5.8 years old C. 1.5 years old D. 0.3 years old E. 7.2 years old
Multiply.(3x6y)(-3x5y2)
A. -9x30y2 B. -9x11y2 C. -9x11y3 D. 9x11y2