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Three dolls have height ratio of 7:6:4, if the middle one is 9 Cm in height, what are the heights of others?? how to work this out?
Hi its Mike here. Please can you explain how to apply the modulus function to an equation or inequality, such as /5x+2/ = 3 or /7x-6/
How should I work this out? A car completes outward journey at 69mph. It returns in heavy traffic over same distance at 23mph. What is the average speed over entire journey? I know it is something to do with the return journey taking 3 times as long.