Factor out the GCF from the polynomial.72x9y9 - 63x6y7 - 90x3y5
A. 9(8x9y9 - 7x6y7 - 10x3y5)
B. 9x3(8x6y9 - 7x3y7 - 10y5)
C. 9x3y5(8x6y4 - 7x3y2 - 10)
D. no common factor
Answer: C
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Write a description of the shaded region using the symbols A, B, C, ?, ?, -, and ' as needed.
A. (A - B) ? (B -A) B. (A ? B) ? (A ? B)' C. A' ? B' D. (A ? B) ? (A ? B)'
Multiply and simplify any radicals in your answer. Assume that all variables represent positive real numbers.(11
)(7
)
A. 154
B. 77
C. 154
D. 308
Solve the problem.Suppose that a radio transmission pattern can be modeled by 
for 
where the units are miles. Determine the predominant direction(s) of transmission and the distance(s) of transmission in such direction(s). Assume that the positive 
points east.
A. Northeast; 80 miles B. North and south; 80 miles C. Northeast and southwest; 6400 miles D. Northeast and southwest; 80 miles
Solve the compound inequality. Write your answer in interval notation or state that there is no solution.8x + 1 ? -39 and 2x - 5 ? -3
A. [-5, ?) B. [1, ?) C. [-5, 1] D. (-?, -5] ? [1, ?)