Evaluate the expression for the given replacement values.2x - y
for x = 9, y = -3
A. 21
B. 14
C. -4
D. 15
Answer: A
Mathematics
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A. 9?2 B. 12? C. 9? D. 12?2
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A. - 2145 B. - 975 C. - 195 D. - 2535
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Write the number in scientific notation.89,000,000
A. 8.9 × 10-6 B. 8.9 × 107 C. 8.9 × 10-7 D. 8.9 × 106
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Convert the angle in degrees to radians. Express the answer as multiple of ?.-90°
A. - 
B. - 
C. - 
D. - 
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