Evaluate the expression.-(-3)2
A. 9
B. -9
C. 6
D. -6
Answer: B
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The magnitude of a star is a measure of its brightness, and it is related to the relative intensity of light reaching Earth from the star. The relationship is
Magnitude 
(Relative intensity).
If relative intensity is multiplied by 123.03. how is magnitude affected? Round your answer to two decimal places if necessary.
?
A. Magnitude is decreased by 2.09. B. Magnitude is increased by 5.23. C. Magnitude is increased by 2.09. D. Magnitude is decreased by 5.23.
Write a formula for the general term (the nth term) of the arithmetic sequence. Then use the formula for an to find a20, the 20th term of the sequence.20, 13 , 6, -1, . . .
A. an = 7n - 27; a20 = 113 B. an = 7n - 20; a20 = 120 C. an = -7n + 20; a20 = -120 D. an = -7n + 27; a20 = -113
Answer the question.For the equation 
= 
, would any numbers have to be rejected if they appeared as potential solutions? Explain.
What will be an ideal response?
Use a double-angle identity to find the exact value of the expression.1 - 2 sin2 67.5°
A. 
B. - 
C. - 
D. 