7
Answer: DSet 1: Polynomial Functions
Explanation
angle R. What is the measure of angle T, in degrees?
Choose the correct answer.
A.
120
B.
75
C.
390
D.✓ Correct
195
Detailed Explanation
Choice D is correct. If a value of x satisfies f ( x ) = 0, the graph of y = f ( x ) will contain a point ( x ,0) and thus touch the x-axis. Since there are 3 points at which this graph touches the x-axis, there are 3 values of x for which f ( x ) = 0. Choice B is incorrect and may result from conceptual or calculation errors. Choice A is incorrect and may result from conceptual or calculation errors. Choice C is incorrect and may result from conceptual or calculation errors.
Key Steps:
•
The correct answer is 195
Why others are wrong:
A: Choice A is incorrect and may result from a calculation error.
B: Choice B is incorrect and may result from a calculation error.
C: Choice C is incorrect and may result from a calculation error.
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