exam Maths Puzzle Numerical Ability

For a fixed rate, a fixed principal amount, and a fixed compounding cycle, the return is an exponential function of time. Using the formula,A=P(1+r/n) , let r = 10%, P = 1, and n

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exam Other Question

solve for y:

(4/5)*x-10*y=-3

Thanks!!
Matt The length of a rectangle is 1cm longer than its width. If the diagonal of the rectangle is 4cm, what are the dimensions(the length and width) of the rectangle?

x + (x+1)= 4

Am I on the right track in solving this problem?