Use the appropriate sum or difference identity to write the given expression as a function of x alone.cos (x - ?)
A. -sin x
B. sin x
C. cos x
D. -cos x
Answer: D
Mathematics
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A piece of machinery valued at $38,000 depreciates at a rate of 7% yearly. How long will it take until it has a value of $19,000? Please round the answer to the nearest tenth.
A. 11.9 years B. 14.9 years C. 12.9 years D. 9.9 years E. 8.9 years
Mathematics
Find the value of the expression.
A. 2
B. 2
C. 2
D. 6
Mathematics
Find the sum without the use of a number line.(-3) + 4
A. -7 B. 1 C. -1 D. 7
Mathematics
Determine whether the given equation is linear or nonlinear.y = 5x + 8
A. linear B. nonlinear
Mathematics