Simplify the algebraic expression.5x + 4y - 9x + 9y
A. 9xy
B. -4x + 13y
C. 13x - 4y
D. 5x - 9x + 4y + 9y
Answer: B
Mathematics
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Solve. Check for extraneous solutions.
- 
= 3
A. {-2} B. {3, 8} C. {2, 38} D. {2}
Mathematics
The quadratic equation is given by the formula
evaluate this formula when a=1, b = 7, and c =10
Mathematics
Solve.x2 = 121
A. 11 B. -12, 12 C. -11, 11 D. 60.5
Mathematics
For the given functions f and g, find the requested function and state its domain.f(x) = 16 - x2; g(x) = 4 - xFind f + g.
A. (f + g)(x) = -x2 - x + 20; all real numbers B. (f + g)(x) = -x2 + x + 12; all real numbers C. (f + g)(x) = x3 - 4x2 - 16x + 64; all real numbers D. (f + g)(x) = 4 + x; {x|x ? -4}
Mathematics