Use the shell method to find the volume of the solid generated by revolving the region bounded by the given curves and lines about the y-axis.y = 7x, y = - 
, x = 1
A. 
?
B. 50?
C. 
?
D. 
?
Answer: A
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Find the indicated composition.f(x) = 4x2 + 3x + 4; g(x) = 3x - 5Find (g ? f)(x).
A. (g ? f)(x) = 4x2 + 9x + 7 B. (g ? f)(x) = 4x2 + 3x - 1 C. (g ? f)(x) = 12x2 + 9x + 7 D. (g ? f)(x) = 12x2 + 9x + 17
Find the LCD. Do not combine fractions.
, 
A. 30x2y5 B. 30x3y3 C. 30xy D. 30x3y5
Solve the system of equations using Gaussian elimination or Gauss-Jordan elimination.4w + 4x - 4y - 4z = -4-w - 3x - 3y - z = -22w + 3x + 3y + 2z = -52w + 4x + 4y + 2z = 6
A. 
B. (-z, z, -z, z)
C. 
D. No solution
Find the coordinates of the vertex and x-intercepts for the quadratic function.f(x) = x2 + 6x + 8
A. vertex (-3, -1) x-intercepts (-2, 0), (- 4, 0) B. vertex (3, -1) x-intercepts (2, 0), (4, 0) C. vertex (-3, 1) x-intercepts (-2, 0), (- 4, 0) D. vertex (3, 1) x-intercepts (2, 0), (4, 0)