Find an equation for the ellipse described.Center at (6, 4); focus at (9, 4); vertex at (11, 4)
A. 
- 
= 1
B. 
+ 
= 1
C. 
+ 
= 2
D. 
+ 
= 1
Answer: B
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Translate the problem to a system of equations, then solve using Cramer's Rule.The perimeter of a rectangle is 24 meters. If the width is doubled and the length is tripled, the perimeter is 60 meters. Determine the original width and length.
A. width = 10 m, length = 20 m B. width = 8 m, length = 12 m C. width = 6 m, length = 6 m D. width = 12 m, length = 12 m
Use an equation to solve the problem.The average price of homes in one neighborhood decreased 8% since last year, a drop of $5,400. What was the average price of a home last year?
A. $64,500 B. $69,500 C. $68,500 D. $67,500 E. $71,500
Provide an appropriate response.Under what circumstances can a system of equations be solved more easily by graphing than be substitution?
What will be an ideal response?
Factor by grouping.10x6 + 15x3 - 8x3 - 12
A. (5x3 + 4)(2x3 - 3) B. (10x3 + 4)(x3 - 3) C. (5x6 - 4)(2x + 3) D. (5x3 - 4)(2x3 + 3)