exam Maths Puzzle Numerical Ability

2(a-4)+4=5(9-a)

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2. Form each of the following:
• A linear equation in one variable
• A linear equation in two variables
• A quadratic equation
• A polynomial of three terms
• An exponential function
• A logarithmic function
if the measure of two complementary angles are in the ratio of 7:8 the degree of the larger angle is what?