Factor completely.x2 + 4xy - 21y2
A. (x - 7y)(x - 3y)
B. (x - 7y)(x + y)
C. (x + 7y)(x - 3y)
D. prime
Answer: C
Mathematics
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Solve. Use ? = 3.14159 as needed.Calculate the area (in square feet) of a concert hall stage shaped like a circular sector with radius 110 ft and central angle 85°. (Round to the nearest whole number, if necessary.)
A. 8975 ft2 B. 242,000 ft2 C. 17,951 ft2 D. 9280 ft2
Mathematics
Provide an appropriate response.
Estimate the quotient by rounding the divisor and dividend to numbers with one nonzero digit. Find the exact value. 
A. 0.0075; 137.847 B. 0.0075; 0.007254 C. 133: 137.847 D. 150: 137.847
Mathematics
Simplify.9 + 25 ? 5 + 3
A. 173 B. 42 C. 137 D. 272
Mathematics
Solve and graph the solutions.|x - 2| > 5
A. 
B. 
C. 
D. 
Mathematics