Find the domain of f.f(x) = 
A. {x | x ? -4}
B. {x | x ? 0, x ? -4}
C. {x | x ? 9}
D. {x | x ? 4}
Answer: B
Mathematics
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Simplify the expression.3y(xy + y) - 9y 2(x - 2 + 5y) + 2(y 3 + y 2)
A. - 6xy 2 + 21y 2 + 20y 3 B. - 6xy 2 + 23y 2 - 43y 3 C. 12xy 2 + 21y 2 - 43y 3 D. 6xy 2 + 21y 2 - 20y 3 E. none of these
Mathematics
Solve the equation. If the equation is an identity or a contradiction, state this.10x - 7 = 50 - 9x
A. x = 57 B. x = -3 C. x = 3 D. x = 43
Mathematics
Determine whether the graph represents a function.
A. A function B. Not a function
Mathematics
Use the quadratic formula to solve the equation.2x2 + 10x = - 4
A. 
B. 
C. 
D. 
Mathematics