Use substitution to factor the trinomial.15x4 - 13x2 - 20
A. (3x2 + 1)(5x2 - 20)
B. (15x2 - 5)(x2 + 4)
C. (3x2 - 5)(5x2 + 4)
D. (5x - 4)(3x + 5)
Answer: C
Mathematics
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Solve the system by graphing.
x - 
y = 5
x + 
y = 12
A. (3, 4) B. (3, 1) C. (4, -3) D. (4, 3)
Mathematics
The following figure shows a portion of the graph of a function f defined on the interval . Sketch the complete graph of f if it is known f is odd.
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Mathematics
Write each mixed number as an improper fraction.11
A. 
B. 
C. 
D. 
Mathematics
Add or subtract. Simplify by combining like radical terms, if possible. Assume all variables and radicands represent nonnegative numbers.
- 7
- 5
A. -28
B. -12
C. -28
D. -12
Mathematics