exam Maths Puzzle Numerical Ability

i pretty much understand how to muliply rational expressions but im having trouble factoring this problem out. its been a while since ive done this

4x^2/9x^2 * 12/21x^3

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exam Other Question

Hello

how to solve each system by substitution:

y = 2x - 8
4x + 3y = 1

thank you.
a scale drawing of a basketball court has a scale of 1 inch : 9 feet. the basketball court is 94 feet by 50 feet. find the dimensions of the court in the drawing.