Evaluate the expression for the given replacement values. Write the answer in simplest form.xy for x = 
, y = 
A. 
B. 
C. 20
D. 
Answer: A
Mathematics
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Simplify.
A. 256a
B. 4a
C. 4
D. 4a2
Mathematics
Factor by grouping.3x2 - 9xy + 5xy - 15y2
A. (3x - 5y)(x - 3y) B. (3x + 5y)(x + 3y) C. (3x2 + 5y)(1 - 3y) D. (3x + 5y)(x - 3y)
Mathematics
Solve the system by elimination, or by any convenient method.
?
?
A. 
and 
B. 
and 
C. 
and 
D. There are infinitely many solutions.
E. There is no solution.
Mathematics
Find the perimeter. Use 3.14 for ? when needed.
A. 29.98 m B. 51.96 m C. 37.98 m D. 59.96 m
Mathematics