Need some help with some questions:
1) The sum of the digits of a two - digit are reverse...
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Mathematics, 21.02.2020 10:29 payshencec21
Need some help with some questions:
1) The sum of the digits of a two - digit are reversed the number is increased by 36. Find the number by solving a pair of simultaneous equations.
2) 3 bags and 4 pens cost $61, whereas 4 bags and 3 pens cost $63.60. Find the cost of a bag and 10 pens.
3) Two runners start from the same point at the same time. They will 4km apart at the end of 2 hours if they are running in opposite directions. Let x be the speed of the faster runner and y be the speed of the slower runner.
i. Write down a pair of simultaneous equations using the fact that distance = speed×time.
ii. Find their speeds.
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