Write a matrix equation equivalent to the system of equations. 3x + 7y = -4-4x - 2y = -4
A. 
=
B.
  = |
C.
=
D.
= 
Answer: B
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Express the integrand as a sum of partial fractions and evaluate the integral.
dx
A. ln 
- 
+ C
B. ln 
- 
+ 
+ C
C. ln 
+ 
+ C
D. ln 
- 
+ 
+ C
A particle moves with position function r(t) = (21t-7t³-5)i+21t²j. Find the tangential component of the acceleration vector.
What will be an ideal response?
Determine whether the graph is that of a function. If it is, use the graph to find its domain and range, the intercepts, if any, and any symmetry with respect to the x-axis, the y-axis, or the origin.
A. function domain: all real numbers range: all real numbers intercepts: (-2, 0), (0, 2), (2, 0) symmetry: none B. function domain: {x|x ? -2} range: {y|y ? 0} intercepts: (-2, 0), (0, 2), (2, 0) symmetry: none C. function domain: {x|x ? 0} range: {y|y ? -2} intercepts: (-2, 0), (0, 2), (2, 0) symmetry: y-axis D. not a function
Multiply.-0.7(-13.8)
A. 9.66 B. -14.5 C. -13.1 D. 14.5