Perform the indicated operations.(x3 + 5xy - 7y2) - (8x3 + 7xy + y2)
A. 9x3 - 2xy - 8y2
B. -7x3 - 2xy - 6y2
C. 7x3 + 2xy - 6y2
D. -7x3 - 2xy - 8y2
Answer: D
Mathematics
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Express in terms of i.
A. 5i
B. -5i
C. ±5
D. -i
Mathematics
The graph of a function of the form y = A cos (Bx - C) + D or y = A sin (Bx + C) + D where B > 0 is given. Determine the equation of the function represented by the graph.Use y = cos x
A. y = 2 cos 
- 2
B. y = 2 cos 
- 2
C. y = 2 cos 
+ 2
D. y = 2 cos 
+ 2
Mathematics
Find an equation of the line through the pair of points. Write the equation in the form Ax + By = C.(-5, -9) and (0, -6)
A. 3x - 5y = 30 B. -3x - 5y = 30 C. 4x + 6y = -36 D. -4x - 6y = -36
Mathematics
Simplify the expression. Assume all variables represent positive real numbers.4
- 3x
A. (4 - 3x)
B. cannot be simplified
C. x
D. 2x
Mathematics