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Question

# You are mixing x grams of ingredient A and y grams of ingredient B. Choose the equation or inequality that models the given requirement. There should be at least 3 more grams of ingredient A than ingredient B. (A) $3 x-y \leq 0$, (B) $x-3 y \geq 0$, (C) $x-y \geq 3$, (D) $3 x-y \geq 0$.

Solution

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Step 1
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There should be $\textit{at least}$ 3 more grams of ingredient A than B (can be more), so we write "$\geq$" :

$x \geq y+3$

$x-y \geq 3$

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