Determine whether the equation is an identity. If it is an identity, prove it.cos2x - sin2x = 1 - 2 sin2x
What will be an ideal response?
The statement is an identity. The student's answer should include a proof.
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For the given inequality, state the inequality that results when the specified operation is performed on both members.1 < 121Take square roots.
A. -1 > -121 B. 1 < 11 C. 1 < 121 D. -1 > -11
Find the requested probability.A box contains the following mixture of colored marbles: 2 black, 3 red, 2 yellow, and 1 green. What is the probability of drawing a red marble followed by a green marble if the two marbles are drawn without replacement?
A. 
B. 
C. 
D. 
Find the indicated probability.If P(A) = 0.3, P(B) = 0.2, and P(A and B) = 0, find P(A or B).
A. P(A or B) = 0 B. P(A or B) = 0.7 C. P(A or B) = 0.5 D. P(A or B) = 0.3
Divide. Express your answer in simplest form.5
÷ -4
A. -1
B. -2
C. -1
D. -1