Evaluate the integral.
dx
A. 3157
B. 15,785
C. -3157
D. 133
Answer: A
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Solve.Elaine has a grassy patch of land on her farm that is a rectangle measuring 20 feet by 60 feet. So her goat can eat grass while Elaine is busy with other farm work, she drove two posts into the ground and fastened a rope to each post, passing the rope through a metal ring on the goat's collar. When the goat pulls on the rope while walking, its path is an ellipse. (See the figure.) If the goat can just reach all four sides of the rectangular patch, find the equation of the elliptical path.
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Using the factoring method, solve for the roots of the quadratic equation.70x2 + 25x = 0
A. x = - 
, x = 25
B. x = - 
, x = 0
C. x = 0
D. x = - 
List the terms of the expression.-5 + 5m + 7mn
A. -5, 5m, 7m, 7n B. -5, 5m, 7m, n C. 5m, 7mn D. -5, 5m, 7mn
Solve each system of equations using matrices (row operations). If the system has no solution, say that it is inconsistent.x + 3y - 2z - w = 274x + y + z + 2w = 14-3x - y - 3z - 2w = -1 x - y - 3z -2w = 11
A. {(27, 14, -1, 11)} B. {(3, 5, -5, 1)} C. {(2, 7, -9, 3)} D. {(3 + w, 5 - 2w, -5 + 2w, w)}