Show that the equation is not an identity by finding a value of x for which both sides are defined but not equal.sin (x - ?) = sin x
A. 0
B. 2?
C. ?
D. 
Answer: D
Mathematics
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Find the acute angle A. Leave answer in decimal degrees rounded to seven decimal places, if necessary.cos A = 0.42515336
A. 295.160371° B. 115.160371° C. 25.160371° D. 64.839629°
Mathematics
Solve the problem.A contractor mixes concrete from bags of pre-mix for small jobs. How many bags with 7% cement should he mix with 5 bags of 19% cement to produce a mix containing 12% cement?
A. 17 bags B. 9 bags C. 12 bags D. 7 bags
Mathematics
Find the relative maximum and minimum values.
f (x, y) = 3x2 + 7y2 = 12xy
Mathematics
Use the commutative property of addition to write an equivalent algebraic expression.8 + 2x
A. 8 + 2x B. 8x + 2 C. 8 - 2x D. 2x + 8
Mathematics