Find an equation for the ellipse described.Center at (0, 0); focus at (0, 5); vertex at (0, -7)
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Answer: D
Mathematics
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Simplify, if possible, by combining like terms.2st2 - 9st2
A. -7st2 B. 7st2 C. -7s2t4 D. Cannot be simplified
Mathematics
Write as a decimal.71.16%
A. 0.7116 B. 0.07116 C. 0.7016 D. 7.116
Mathematics
Multiply, and then simplify if possible. Assume all variables represent positive real numbers.(
- 
)(
+ 
)
A. 2
- 7
+ 2
+ 14
B. 2
+ 7
- 2
+ 14
C. 2
+ 7
+ 2
+ 14
D. 2
+ 7
- 2
- 14
Mathematics
Suppose you obtain a mortgage loan of $200,000 at an annual interest rate of 7.0%. How much less is the interest paid over the life of a 15-year loan than over the life of a 25-year loan? Round your answer to the nearest cent.
a. $100,489.34 b. $224,067.52 c. $123,578.18 d. $115,229.44 e. $69,137.67
Mathematics