Find the product.(5x - 9y)2
A. 5x2 - 90xy + 81y2
B. 5x2 + 81y2
C. 25x2 - 90xy + 81y2
D. 25x2 + 81y2
Answer: C
Mathematics
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Solve.The displacement y (in cm) of an object hung vertically from a spring and allowed to oscillate is given by the equation 
where t is the time (in s). Find the first three terms of the Maclauren expansion of this function.
A. 9t + 6.3t2 + 2.205t3 + . . . B. 9t + 12.6t2 + 1.41t3 + . . . C. 9t + 3.15t2 - 0.03t3 + . . . D. 9t + 6.3t2 + 0.705t3 + . . .
Mathematics
Convert.4,400,000 centimeters = kilometers
A. 4.4 B. 440 C. 0.44 D. 44
Mathematics
Find the opposite of the integer.9
A. 9 B. -9 C. -1 D. 0
Mathematics
Solve.Use the following graph to solve x2 + 2x - 15 = 0.y = x2 + 2x - 15
A. -3, 5 B. 3, 5 C. -5, -3 D. -5, 3
Mathematics