exam Maths Puzzle Numerical Ability

The sum of two numbers is 31. The larger is 2 less than twice the smaller. Find the numbers.

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The increase in a jogger�s heartbeat in beats per minute is related to her increase in speed in feet per second by a linear equation. What is the slope of the graph of the equatio Find an exponential function of the form f(x)=ba^x+c with y-intercept 2, horizontal asymptote y=-2, that passes through the point P(1,4).