Solve the system by substitution.x + y = 10x - y = 8

A. No solution
B. (9, 1)
C. (-9, 2)
D. (8, 2)


Answer: B

Mathematics

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A. -5
B. -15
C. -5
D. 9

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List the intercepts of the graph. 

A. (-1, 0) B. (0, -1) C. (0, 1) D. (1, 0)

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Find the sum.5 + 10 + 15 + ... + 250

A. 6250
B. 6375
C.
D. 6125

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Decide whether the problem is an equation or an expression.2(6 - x) + 

A. Equation B. Expression

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