Solve the system by the method of your choice. Identify systems with no solution and systems with infinitely many solutions, using set notation to express their solution sets.x + y = -9x - y = 12
A. {(1.5, 10.5)}
B. {(1.5, -10.5)}
C. {(x, y) | x + y = -9}
D. ?
Answer: B
Mathematics
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A. 6
B. 2
C. 2
D. 2
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Find a decimal approximation for the fraction or mixed number, rounded to the given place value. -5
; tenths
A. -5.5 B. -0.2 C. -5.55 D. -6.5
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Let x be a number. Translate the English phrase or sentence into a mathematical expression. -4 times a number
A. -4x B. 4x C. -4 ÷ x D. -4 + x
Mathematics
Solve the system by the addition method.
A. {(4, 5), (-4, 5), (4, -5), (-4, -5)} B. {(4, 5), (-4, -5)} C. {(5, 4), (-5, -4)} D. {(5, 4), (5, -4), (-5, 4), (-5, -4)}
Mathematics