exam Maths Puzzle Numerical Ability

5. Mandy begins bicycling west at 20mph. Liz leaves from the same point 1 hour later bicycling west at 30mph. When will she catch up with Mandy?

a. Define the variables.
b. M

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exam Other Question
2x^3y^3(-4x^2-2xy^4+y^3)


(A) -8x^5y^3-4x^4y^7+2x^3y^6 |x-4y|=8 solving for X&Y by graphing