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Maria walks a round trip of 0.75 mile to school every day.how many miles will she walk in 4.5 days

What is the value of p in the equation y^ = -4x?

Answer asap and if you do you will get brainliest. catherine buys a gallon of ice cream from the store. after taking it home, she eats a fifth of a gallon of ice cream. her sister eats some of the ice cream as well. if two-thirds of the original amount of ice cream is left, then what fraction of a gallon of ice cream did her sister eat?