Determine the area of a triangle having the following measurements. Round your answer to two decimal places.
A) 76.18 sq. units
B) 114.27 sq. units
C) 95.23 sq. units
D) 104.75 sq. units
E) 85.70 sq. units
C) 95.23 sq. units
Mathematics
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Find the exact value of the expression. Do not use a calculator.sin 
- cos 
A. 
B. 
C. 0
D. 1
Mathematics
Graph the solution set of the inequality or system of inequalities.x + 2y ? 2x - y ? 0
A. 
B. 
C. 
D. 
Mathematics
Use Cramer's rule to solve the system of equations. If D = 0, use another method to determine the solution set. x + y = 45x + 5y = 20
A. {(5, -1)} B. Cramer's rule does not apply since D = 0; ? C. Cramer's rule does not apply since D = 0; {(4 - y, y)} D. {(0, 0)}
Mathematics
Solve the equation.
+ 
= 
A. {-4} B. {-1} C. {4} D. {1}
Mathematics