Find the exact value of y, or state that y is undefined.y = cos-1 
A. - 
B. 
C. 
D. 
Answer: B
Mathematics
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A worker cuts a 57 feet beam into two pieces. He wants one piece to be 3 feet shorter than three times the length of the other piece. Find the length of shorter piece.
A. 12 B. 15 C. 42 D. 18
Mathematics
Multiply and simplify.
? 
A. 
B. 
C. 
D. 
Mathematics
Write the expression with positive exponents only. Then simplify, if possible.
A. x3y4
B. 
C. 
D. 
Mathematics
Perform the indicated operation and express in lowest terms.
- 
A. x + 5
B. 
C. 
D. 
Mathematics