book Maths Puzzle Numerical Ability

HOW DO YOU SUBTRACT,DIVIDE,ADD,AND MULTIPLY REAL NUMBERS?

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book Other Question

2/3 is to 3/4 as X is to 21/24 ?

I had a bunch of other questions similar to this one but they were all decimals. I don't no why but im banging my head over what I know is an ea How do you find the vertex and intercepts for

y = x^2 -6x

and how do you graph it?

Any help is appreciated!