Solve the system using Gaussian elimination. If (x, y) is the solution to the system, give the value of 
.
?
?
A. -14
B. -13
C. -12
D. -9
E. -15
Answer: C
Mathematics
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Find the equation of the curve described by the given information.Ellipse: center 
, focus 
, major axis 26 units
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Mathematics
Solve.2y2 - x2 = 1xy = 1
A. (-1, -1)
B. (1, 1)
C.
| No real number solution exists. |
D. (1, 1), (-1, -1)
Mathematics
Write the word phrase as an algebraic expression. Use x to represent the unknown number.8 times a number, minus 5
A. 5 - 8x B. 8 - 5x C. 8x - 5 D. 5x - 8
Mathematics
The given point lies on the graph of the unit circle and corresponds to a real number t. Find the value of the indicated trigonometric function of t.
Find sin t.
A. - 
B. - 
C. - 
D. 
Mathematics