Jim is buying snacks for the school dance .He needs 15 bags of chips .Each bag of chips cost 4.39 and each bag of pretzels cost 3.89

Well you didn't list any pretzels so the bag of chips are equal to $65.85

Step-by-step explanation:

4.39x15=65.85

because linear equations are a lot simpler than quadratics equations, and linear equations formula is a lot easier to memorize. that's why i think they're harder.