exam Maths Puzzle Numerical Ability

how do u calculate the focus if the vertex is not at the origin?

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exam Other Question

ron and doug leave the same point at the same time traveling in cars going in oppisite directions. ron travels at 40 miles per hour and doug travels at 60 miles per hour. in how many hours will the be 450 miles apart? Write in simplest form.
7x^2
over
63x^12