For expression , replace z with 90°, and then simplify as much as possible.
?

A.
B. ?
C. ?
D. ?
E. ?

Answer: B

Mathematics

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Express the symbolic statement ~p in words.p: Vitamin C helps the immune system.

A. Vitamin A helps the immune system. B. Vitamin C may help the immune system. C. It is true that Vitamin C helps the immune system. D. Vitamin C does not help the immune system.

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Factor completely.x2 - 49

A. (x + 7)2 B. cannot be factored C. (x + 7)(x - 7) D. (x - 7)2

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Determine the amplitude and find the phase shift in radians (to the nearest tenth).y = -5 sin x + 7 cos x

A. , -2.5
B. 148, -2.5
C. , 2.5
D. 148, 2.5

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Answer the question.What does the digit 7 mean in the number 189,247?

A. 7 hundreds B. 7 tens C. 7 thousands D. 7 ones

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