exam Maths Puzzle Numerical Ability

The sum of two numbers is 48. The difference between three times the smaller number and the larger number is 16. Find the numbers.

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exam Other Question

triangle ABC is inscribed in a circle. given that AB is a 40 degree arc and ABC is a 50 degree angle, find the sizes of the other arcs and angles in the figure.

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Could someone PLEASE show me the graphs for these equations? I have several questions like them, and it would help me a great deal! Thank you!
(a) 2
(b) 1/2
(c) -2
(d) -1/2