Use a graphing calculator to solve the system.5x + y = 23 x + 6y = -7
A. {(-5, -2)}
B. {(5, 4)}
C. {(5, -2)}
D. {(4, 3)}
Answer: C
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The matrix associated with the solution to a system of linear equations in x, y, and z is given. Write the solution to the system, if it exists.
A. inconsistent system, no solution B. infinitely many solutions of the form x = 5z + 5, y = 2z + 2, z = 1 C. x = 0, y = 0, z = 1 D. infinitely many solutions of the form x = 5 - 5z, y = 2 - 2z, z = z
Find the value for the function.Find -f(x) when f(x) = |x| - 8.
A. -|x| + 8 B. -|x| - 8 C. |-x| + 8 D. |-x| - 8
Find an equation for the ellipse.Center at (0, 0); focus at (-3, 0); vertex at (6, 0)
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Solve the problem.After a 16% price reduction, a boat sold for $22,680. What was the boat's price before the reduction? (Round to the nearest cent, if necessary.)
A. $3628.80 B. $26,308.80 C. $27,000 D. $141,750.00