Write a numerical expression for the phrase and simplify it.Fifteen less than the difference between four and negative eight
A. (4 - 8) - 15; -19
B. [4 - (-8)] - 15; -19
C. [4 - (-8)] - 15; -3
D. 15 - [4 - (-8)]; 3
Answer: C
Mathematics
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Construct a truth table for the statement.(p ? ~r) ? (p ? ~r)
A. 
| T | T | T |
F T F
F F F
B.
| T | T | F |
F F F
F T T
C.
| T | T | T |
F T F
F F T
D.
| T | T | F |
F T T
F F T
Mathematics
Identify the vertex of the parabola.y = 3x2 - 6x + 0
A. (3, -1) B. (-3, 1) C. (-1, 3) D. (1, -3)
Mathematics
Multiply and simplify. Assume that all variables represent positive real numbers.(x - 
)(3x + 
)
A. 3x2 + 2x
- y
B. 3x2 - 2x
- y
C. 3x2 - 2x
- y3
D. 3x2 - 4x
Mathematics
x? = x + 5y, y? = ?x ? 3y
Solve the first-order linear system.
Mathematics