Find the exact value. Do not use a calculator.cos 
A. 
B. 
C. 
D. 
Answer: C
Mathematics
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Factor.81x2 - 64y2
A. (9x - 8y)2 B. prime C. (9x + 8y)(9x - 8y) D. (9x + 8y)2
Mathematics
Integrate the function.
A. 
+ C
B. 
+ C
C. 
+ 
+ C
D. 
+ C
Mathematics
Solve the system by the best method. Use set notation to express the solution set.
A. no solution; ? B. {(-8, 0)} C. {(7, 0)} D. {(-7, -1)}
Mathematics
Write the rate as a fraction in simplest form.A biker goes 90 yards in 45 seconds.
A. 
B. 
C. 
D. 
Mathematics