Solve by elimination and check.x + y = -8x - y = 4

A. (2, -5)
B. (-3, -5)
C. No solution
D. (-2, -6)


Answer: D

Mathematics

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For the given arithmetic series, what is Sn?a1 = 9, d = 6, and n = 98

A. 29,400 B. 117,600 C. 29,409 D. 58,800

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Factor, if possible.10y2 + 45y - 25

A. 5(2y + 1)(y - 5) B. 5(2y - 1)(y + 5) C. (2y - 1)(5y + 25) D. (10y - 5)(y + 5)

Mathematics

For the given function, find all asymptotes of the type indicated (if there are any).f(x) = , horizontal

A. y = 
B. y = 
C. None
D. y = 0

Mathematics

Solve the problem.The pH of a solution ranges from 0 to 14. An acid has a pH less than 7. Pure water is neutral and has a pH of 7. The pH of a solution is given by  where x represents the concentration of the hydrogen ions in the solution in moles per liter. Find the hydrogen ion concentration if the 

A. 102 B. 10-2 C. 0.5 D. 0.69

Mathematics