exam Maths Puzzle Numerical Ability

Two buses leave Houston at the same time and travel in oppisite direction. One bus averages 55 mi/h and the other bus averages 45 mi/h. When will they be 400 mi apart?

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Solve the system 3y-2x=6 and 3y+2x=15 graphically. Estimatethe coordinates of the intersection point to the nearest half unit. Solve each of the following systems by addition. If a unique solution does not exist, state whether the system is inconsistent or dependent. Problem 12 is reminiscent of Examples