Solve the system by the addition method.
A. {(-3, -8), (-8, -3)}
B. {(3, 8), (-3, 8), (3, -8), (-3, -8)}
C. {(3, 8), (8, 3), (-3, -8), (-8, -3)}
D. {(3, -8), (3, 8)}
Answer: B
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A. s9t10 B. s5t8 C. s5t9 D. s5t7
Simplify the algebraic expression by collecting and combining like terms.
(6x + 3) - 
(4x - 4)
A. 
B. - 3
C. 9
D. - 
One mole of gas expands isothermally to double its volume. If the gas temperature is 400K, what energy (in joules) is absorbed? ? Please enter your answer as a number without the units, rounded to the nearest integer.
Fill in the blank(s) with the appropriate word(s).
Solve the compound inequality and write the solution set using set-builder notation. Graph the solution set using a number line.x ? 4 or 3x < -12
A. {x
}
B. {x
}
C. {x
}
D. {x
or x ? 4}