Write the linear system as a matrix equation in the form AX = B, where A is the coefficient matrix and B is the constant matrix. 5x + 2y - 2z = 37 4x + 3y + 5z = 22 7x - 2y + 6z = 15
A. 
= 
B. 
= 
C. 
= 
D. 
= 
Answer: C
Mathematics
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Find x:
-20 ÄÄÄ = 2 5x a. x = -2 b. x = 4 c. x = -10 d. x = -14 e. x = 20
Mathematics
Solve.A guy wire to a tower makes a 73° angle with level ground. At a point 40 ft farther from the tower than the wire but on the same side as the base of the wire, the angle of elevation to the top of the tower is 
Find the length of the wire to the nearest foot.
A. 90 ft B. 95 ft C. 50 ft D. 45 ft
Mathematics
Evaluate the integral.
A. 2.8 B. 3.4 C. 4.67 D. 5.67
Mathematics
Determine the x- and y-intercepts of the graph of the quadratic equation.y = x2 + 4x - 7
A. x-intercepts: none; y-intercept: -7
B. x-intercepts: 1 - 
, 1 + 
; y-intercept: -7
C. x-intercepts: -2 - 
, -2 + 
; y-intercept: -7
D. x-intercepts: -1 - 
, -1 + 
; y-intercept: -7
Mathematics