Prove the identity.
= 
.
What will be an ideal response?
= 
= 
? 
=
.
Mathematics
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Find the square root. Do not use a calculator. Do not refer to a table of square roots.
A. -1 B. 1 C. 0 D. does not exist
Mathematics
Simplify the expression. Assume that variables can represent any real number.
A. 
B. - 
C. 
D. - 
Mathematics
Solve the problem.In how many ways can 6 people be seated in a row that has 3 vacant seats?
A. 84 B. 60,480 C. 720 D. 362,800
Mathematics
Divide.-30 ÷ 
A. 
B. -42
C. 42
D. 6
Mathematics