Question
One mango cost 2 times as much as one mangosteen. Mrs Zhang bought 3 mangoes and 4 mangosteens for $29.70. How much would 7 mangoes and 9 mangosteens cost? Express the answers to 2 decimal places.
3 m

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One mango cost 2 times as much as one mangosteen. Mrs Zhang bought 3 mangoes and 4 mangosteens for $29.70. How much would 7 mangoes and 9 mangosteens cost? Express the answers to 2 decimal places.