exam Maths Puzzle Numerical Ability

two jets are traveling towards each other and are 4000 km apart. The rate of one jet is 100 km/h faster than the rate of the other. if the jets pass each other after 2.5 hours, what is the rate of the faster jet?

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What is the slope of the line whose equation is 2y=5x+4? when you double a number & add 22, you get 5/8 of the original number-what is the original number?