exam Maths Puzzle Numerical Ability

GCF

x^2y, 3x^3y, and 6x^2

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exam Other Question

x + 2y = 0
4x -z = 4
5y + z = -1

solve each system using substitution Two cars leave City A at the same time to travel to city B. One car travels at 72 km/h and other at 78 km/h. If the slower car arrives 20 min. after the faster car, how far apart are City A and City B?