Rewrite the expression as an equivalent expression that does not contain powers of trigonometric functions greater than 1.f(x) = cos4 x
A. 
B. 
C. 
D. 
Answer: D
Mathematics
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Factor.9 + 6x + x2
A. (x + 3)(x - 3) B. (x - 3)2 C. (x + 3)2 D. Not factorable
Mathematics
Write as a decimal.388%
A. 38.8 B. 3.88 C. 3.89 D. 0.388
Mathematics
The following table shows the earnings for the Juarez family last year. Use this information to answer the question.MonthEarningsMonthEarningsJan.$1400July$1300Feb.$1150Aug.$2450Mar.$2950Sept.$2500Apr.$2300Oct.$2000May$1650Nov.$2350June$2700Dec.$2400If 
of the family income is spent on entertainment, how much did they spend for entertainment last year?
A. $5400 B. $4200 C. $5030 D. $5920
Mathematics
Determine the domain of the function.f(x) = 
A. {x? x ? -9} B. {x? x ? 9, x ? -9} C. {x? x is a real number} D. {x? x ? 9}
Mathematics