Question: 9. If the expression (2x - 3y) (4x + 5y) + x2(k + 2) is expanded and simplified, the coefficient of x2 is 6. What

9. If the expression (2x - 3y) (4x + 5y) + x2(k + 2) is expanded and simplified, the coefficient of x2 is 6. What is the value of k? a. 6 b. C. " d. NONE OF THESE 10. A crystal weighs 0,005g , what is the precision? a. Thousands of grams b. Thousandths of grams C. 1 d. NONE OF THESE

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