Use sum-to-product identities to rewrite the expression as a product.sin 51° - sin 21°
A. 2 sin 36° cos 15°
B. -2 sin 36° sin 15°
C. 2 cos 36° sin 15°
D. 2 cos 36° cos 15°
Answer: C
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?Which of the following does not describe a viable method to find the sum 3 + (-4)?
A.
?Let p = positive unit, and n = negative unit. 
+ 
--> four p's and four n's eliminate each other. Answer = n.
B.
?Let p = positive unit, and n = negative unit. 
+ 
--> Answer is 3p + 4n.
C.
?On a number line, start at +3 and move left 4 units. You arrive at -1.
D.
?On a number line, combining +3 - 4 will result in the same answer as 3 + (-4).
E.
?On a number line, combing -4 + 3 will result in the same answer of 3 + (-4).
Divide.
A. 3x6 - 5x2 B. 3x8 - 5x4 C. 3x7 - 5x3 D. 24x6 - 40x2
Solve the problem.Find the probability of getting 2 tails when 3 fair coins are tossed.
A. 
B. 
C. 
D. 
Evaluate the expression for the given replacement values. Write the answer in simplest form.
for x = 
, y = 
A. 
B. 2
C. 
D. 