exam Maths Puzzle Numerical Ability

how do you write this into a equivalent expression using the distributive property 4(1+y)

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exam Other Question

An airplane travels from points A and B with a distance of 1500 km and a wind along its flight line. If it takes the airplane 2 hours from A to B with the tailwind and 2.5 from B to A with the headwind, what is the velocity? I dont understand how to make a word problem into an inequality.