In a rectangle has vertices (3,7), (15,7), (3,-2), and (15,-2), then the length of diagonal is?

The value of x in this system of equations is 1. 3x + y = 9 y = –4x + 10 substitute the value of y in the first equation: combine like terms: apply the subtraction property of equality: apply the division property of equality: 3x + (–4x + 10) = 9 –x + 10 = 9 –x = –1 x = 1 what is the value of y?

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What is the slopeof the live that passes through the points and (-2,-5) and (3,-1)