Write the product in standard form.( - 9i)( + 9i)

A. 22
B. 13 + 81i
C. 94
D. 13 - 81i

Answer: C

Mathematics

Use the half-angle formulas to simplify the given expression.

A. 4 sin 15x
B. 2 sin 15x
C. sin 15x
D. 2 cos 15x

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Mathematics

Simplify.(5x-4)-3

A.
B.
C.
D. 125x¹²

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Mathematics

Round the number as indicated.247 to the nearest hundred

A. 100 B. 210 C. 300 D. 200

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Mathematics

Factor out the greatest common factor.3x2y5 + 18x2y4

A. x2y4(3y + 6) B. 3x4y2(y + 6) C. 3x2y4(y + 6) D. y + 6

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Mathematics