Find the exact value of the expression.sin 260° cos 20° - cos 260° sin 20°
A. - 
B. - 
C. 
D. - 
Answer: B
Mathematics
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Express the weight of 7 pounds (about 0.88 gallons) of water in ounces.
A. 70 oz B. 140 oz C. 112 oz D. 84 oz E. none of the above
Mathematics
Solve the system by substitution. If the system is inconsistent or dependent, say so.
A. (4, 4) B. infinite number of solutions of the equation y - 6x = 4; dependent system C. (2, -4) D. empty set solution; inconsistent system
Mathematics
For the pair of vectors, find 
.
?
?
A. 16 B. 20 C. 18 D. 17 E. 19
Mathematics
Simplify 
if 
for some real number x.
??
A. 
B. 
C. 
?
D. 
E. 
Mathematics