Mathematics, 30.01.2021 01:00, choudharykaran7997

Are the graphs of y = -5x + 9 and 5x + y = -21 parallel, perpendicular, or neither? Explain. I need some help please

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Are the graphs of y = -5x + 9 and 5x + y = -21 parallel, perpendicular, or neither? Explain. I need...