Find the area of the triangle by using Heron's formula. Round the answer to the nearest tenth. All sides are measured in inches.a = 40, b = 58, c = 67
A. 1442.4 sq in.
B. 1153.9 sq in.
C. 127 sq in.
D. 1730.9 sq in.
Answer: B
Mathematics
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Use the substitution formula to evaluate the integral.
dx
A. 
- 
B. 5
- 8
C. 
- 
D. 
Mathematics
What part of the object or set of objects is shaded?
A. 
B. 
C. 
D. 
Mathematics
Use the Gauss-Jordan method to solve the system of equations. If the system has infinitely many solutions, let the last variable be the arbitrary variable.x - z = -5y + z = 1x + z = 2
A. {(-5, 1, 0)}
B. 
C. 
D. {(-3, -5, 7)}
Mathematics
Determine whether the graph of the equation is symmetric with respect to the x-axis, the y-axis, and/or the origin.y = 
A. origin B. y-axis C. x-axis D. x-axis, y-axis, origin E. none
Mathematics