exam Maths Puzzle Numerical Ability

Use cross products to determine whether each of pair of ratios forms a proportion:

4/9, 12/27

Please explain how to solve this problem.

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exam Other Question

The larger of two numbers is 8 more than four times the smaller. If the larger is increased four times the smaller, the result is 40. Find the numbers. 10.) Find the slope and the y-intercept.

f(x) = -6x - 4

The slope is _______

The y-intercept is [0, ____]