exam Maths Puzzle Numerical Ability

three times the larger of two numbers is equal to four times the smaller. The sum of the numbers is 21 (12+9). Find the numbers.

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exam Other Question

I really need help with these questions.

Evaluate each function for x= -2,0,and 5.

1.) y = 9 + x

2.) y = x^2 - 1

Please help me because I need to get this to my teacher tommorrow. Solve the following quadratic equation by completing the square. I get the first part then i get lost, please help me. x^2-6x-3=0