Add or subtract as indicated.(-3mn + 9mn2 - 4m2n2) + 
A. -13mn + 12m2n + 4m2n2
B. 7mn + 9mn2 + 3m2n + 4m2n2
C. 4m2n2 + 3m2n + 9mn2 - 13mn
D. 3m2n2
Answer: C
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Solve the equation for the indicated variable.ax + b = 0 for x
A. - 
B. -ab
C. 
D. -b - a
Express the relationship between a small change in x and the corresponding change in y in the form 
.f(x) = sin(3x2)
A. dy = -6x cos(3x2) dx B. dy = -6 cos(3x2) dx C. dy = 6x cos(3x2) dx D. dy = 6 cos(3x2) dx
Write the ordered pair for each point shown in the xy plane.
A. E = (-5, -4), G = (3, -4) B. E = (-5, 3), G = (-4, -3) C. E = (-5, 3), G = (-3, -4) D. E = (3, 6), G = (-4, -3)
Solve. Graph the solution on a number line, and express it in interval notation.-3(4x - 12) < -15x + 9
A. x ? -9, (-?, -9]
B. x ? -9, [-9, ?)
C. x < -9, (-?, -9)
D. x > -9, (-9, ?)