exam Maths Puzzle Numerical Ability

A health food store sells seasoning blends in bulk. One blend contains 20% basil. Shelia wants to add pure basil to some 20% blend to make 16 ounces of her own 30% blend. Let b represent the amount of basil Shelia should add to the 20% blend.

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i need help with 9x^6y^2/15x^5y^5 After examining accounting records for the past several years, he found that the store has been grossing over $850 per day about 60% of the business days it is open. Estimate the p