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The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?

Solve 3x-18=2y and 5x-6y=14 by elimination or substitution . show all !

Abicycle training wheel has a radius of 3 inches. the bicycle wheel has a radius of 10 inches.approximately how much smaller, in square inches and rounded to the nearest hundredth, is the area of the training wheel than the area of the regular wheel? *