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