Perform the indicated operation.Subtract.9x9 + 6x8 - 6x7 + 6
A. 13x9 + 9x8 - 10x7 + 3
B. 5x9 + 9x8 - 10x7 + 9
C. 13x9 + 9x8 - 10x7 + 9
D. 5x9 + 3x8 - 2x7 + 3
Answer: D
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Find the vertex, the focus, and the directrix of the parabola.y = -2x2 - 20x - 52 = 0
A. V: 
; F: 
; D: x = - 
B. V: 
; F: (-5, -4); D: x = 0
C. V: (-5, -2); F: 
; D: y = - 
D. V: 
; F: (-5, -10); D: x = -6
Provide an appropriate response.Suppose that you can invest $11,000 in a business that guarantees you the following cash flows: $5500 at the end of 2 years, $4500 at the end of 4 years, and $4000 at the end of 5 years. Assuming an interest rate of 6.25% compounded annually, find the net present value of the cash flows. Is the investment profitable?
Fill in the blank(s) with the appropriate word(s).
Simplify.
- 
+ 
A. 
B. 
C. 
D. 
Use the figure below to answer the problem. Assume AC\\DE and BD//CF .
