Find the exact value of the expression.sin 20° cos 40° + cos 20° sin 40°

A.
B.
C.
D.


Answer: D

Mathematics

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Perform the indicated operation.(-5x7 + 2x9 + 9) + (-7x8 + 6) - (2x8 + 6x9 - 7x7)

A. 8x9 - 5x8 - 12x7 + 15 B. -4x9 - 9x8 + 2x7 + 15 C. 8x9 - 5x8 - 12x7 + 3 D. -4x9 - 5x8 - 12x7 + 3

Mathematics

Use the power rules for exponents to simplify. Write the answer in exponential form.(2x3y2)3

A. 8x6y5 B. 8x9y6 C. 2x6y5 D. 2x9y6

Mathematics

Find the inverse of the function.f(x) = 

A. Not a one-to-one function
B. f-1(x) = 
C. f-1(x) = 
D. f-1(x) = 

Mathematics

Provide an appropriate response.Why can't y = 2x have an x-intercept?

What will be an ideal response?

Mathematics