Question

The price of milk tripled, and then rose another $0.75 per gallon. If the price now is AT LEAST $4.50 per gallon, which inequality expresses this situation? A) 3x + 0.75 ≤ 4.5 B) 3x + 0.75 ≥ 4.5 C) 3x - 0.75 ≥ 4.5 D) 3(x + 0.75) ≤ 4.5

Answer 1

The answer would be B because in the question it says the price tripled (3x) and that it rose another $0.75 (+0.75). It also says at least $4.50, meaning it could be 4.50 or more than 4.50. So, it's
$3x + 0.75 \geqslant 4.50$

Answer 2

This can be represented by the inequality:

3x + 0.75 ≥ 4.5

Inequality shows the non-equal comparison between two numbers or mathematical expressions.

Let x represent the price of milk per gallon.

Since the price of milk tripled, and then rose another $0.75 per gallon, hence:

Price of milk = 3x + 0.75

The price is now is AT LEAST $4.50 per gallon, hence this can be represented by the inequality:

3x + 0.75 ≥ 4.5

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