Mrs. huang operates a soybean farm. She buys many supplies in bulk. Often the bulk products need to be custom mixed before ms. huang can use them. To apply herbicide to a large field she must mix a solution of 67%. Herbicide with a solution of 46% herbicide to form a 42 liters of a 55% solution. How much of the 67% solution must she use

let x be the money she spent so that she can earn the free t-shirt.

since, she already spent $112.49

⇒

also, as per the statement: jennifer must spend $250 or more in order to qualify for a free t-shirt at the store.

then,

we have an inequality i.,e

subtract 112.49 from both sides we get;

therefore, $137. 51 more money does jennifer need to spend so that she can earn the free t-shirt

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