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n(n+1)n x n = n²n x 1 = nanswer = n²+ n

280 - 80 = 200200 / 80 = 2.52.5 x 100 = 250% increase

100% - 30% = 70%£50 = 70%£50/70 = 0.714£0.714 = 1%100% = £71.4

To solve, begin by multiplying both sides of the first equation by 3. This will make the coefficients of y in each equation an equal value of 3. With 15x + 3y = 63 and x -3y = 9, we can now simply add the...

Square root of 36 = -6,6