book Maths Puzzle Numerical Ability

use cross products to setermine whether each pair of ratios forms a proportion. is the answer yes or no?
the problem...
7/6,52/48
i cross multiplied but i keep on messing it up

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book Other Question

what is the equation of the parabola with the focus (3,-1)and diretrix y=5 Find the x-intercept and y-intercept of the equation 5x − 3y = 30.