State whether the equation is the result of an identity, commutative, associative, or distributive property.9(x + 9) = 9x + 9 ? 9
A. Commutative
B. Associative
C. Identity
D. Distributive
Answer: D
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Solve the problem.The intensity of a certain noise is 1.28 × 10-8 W/cm2. How loud, in decibels, is this sound level? Use the formula 
where 
(Round to the nearest decibel.)
A. 82 decibels B. 81 decibels C. -21 decibels D. 34 decibels
Multiply: (1+j)(3-4j)
What will be an ideal response?
The graph of the function f is shown below. Match the function g with the correct graph.g(x) = f(x + 3)
A. 
B. 
C. 
D. 
Solve.A vendor has learned that, by pricing hot dogs at $1.25, sales will reach 115 hot dogs per day. Raising the price to
will cause the sales to fall to 71 hot dogs per day. Let y be the number of hot dogs the vendor sells at x dollars each. Write a linear equation that models the number of hot dogs sold per day when the price is x dollars each.
A. y = -44x + 170
B. y = -44x - 170
C. y = - 
x + 
D. y = 44x + 60