exam Maths Puzzle Numerical Ability

Write down the coefficient of the term 4x4y2z in the algebraic expression 4x4y2z - 3x3y2z + 3/2xy3z2. I don't even know what this means. Can someone please help me.

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exam Other Question

An athlete runs a rate of 3 meters per second around a 400-meter track. Which equation best represents the distance covered if he has already run 2 laps?
A. D=400+3s
B. D=800+3s
C. D=800+6s
D. D=800-3s My niece called with this question? Find the solution of x-3y>2,2x-y<4,and3x+4y>0. They need to find the value of y.