Use Gaussian elimination and matrices to solve the system of linear equations. Write your final augmented matrix in triangular form and then solve for each variable using back substitution.x - y + 4z=152x + z= 3x + 4y + z=-9
A. (3, -3, 0)
B. (3, 0, -3)
C. (0, -3, 3)
D. (0, 3, -3)
Answer: C
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Evaluate the requested trigonometric function using the information given. sin ? = 
; ?/2 < ? < ?Find sec ?.
A. - 
B. - 
C. - 
D. 
Provide an appropriate response.Find the diameter of a circle whose circumference is 25 ft (round to the nearest hundredth).
Fill in the blank(s) with the appropriate word(s).
Solve.A rocket is shot straight up in the air from the ground at a rate of 53 feet per second. The rocket is tracked by a rangefinder that is 499 feet from the launch pad. Let d represent the distance from the rocket to the rangefinder and t represent the time, in seconds, since "blastoff". Express d as a function of t.
A. d(t) = 
B. d(t) = 
C. d(t) = 4992 + (53t)2
D. d(t) = 499 + 53t2
Find (f ?g)(x) for the given functions f(x) and g(x).f(x) = x + 8 and g(x) = 8x - 3
A. 7x + 11 B. 9x + 5 C. 8x + 61 D. 8x + 5