Graph the expression on each side of the equals symbol to determine whether the equation might be an identity.1 + tan2 x = 
A. Not an Identity
B. Identity
Answer: A
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Answer the question.Describe the graph of the function f(x) = x + 3 if the domain is 
.
A. The graph consists of the four points (2, 3), (3, 3), (4, 3), and (5, 3). B. The graph consists of the four points (2, 5), (3, 6), (4, 7), and (5, 8). C. The graph is a line through the four points (2, 5), (3, 6), (4, 7), and (5, 8). D. The graph consists of the four points (0, 5), (1, 6), (2, 7), and (3, 8).
Use the principle of square roots to solve the equation.(x + 9)2 - 2 = 0
A. -7, 11
B. 9 ± 
C. -3 ± 
D. -9 ± 
Solve the problem.Suppose that the speed of a car, measured in miles per hour (mph), is monitored for some short period of time after the driver applies the brakes. The following table and graph relate the speed of the car to the amount of time, measured in seconds (sec), elapsed from the moment that the brakes are applied.
Is the slope of the graph positive or negative and is the slope constant, or does it change over time?
A. Positive, changes over time B. Negative, changes over time C. Positive, constant D. Negative, constant
Solve the problem.A vendor has learned that, by pricing pretzels at $1.00, sales will reach 112 pretzels per day. Raising the price to $2.00 will cause the sales to fall to 68 pretzels per day. Let y be the number of pretzels the vendor sells at x dollars each. Write a linear equation that models the number of pretzels sold per day when the price is x dollars each.
A. y = -44x - 156
B. y = - 
x + 
C. y = 44x + 68
D. y = -44x + 156