Mathematics, 29.03.2021 19:20, saintsfan2004

A cup of tea costs $3 at a local cafe. Alan and his wife, Patty, have a coupon for $1 off their order. Alan says the expression 3t-1 represents the cost for t cups of tea. Patty says the expression 3t+(-1) represents the cost. Are their expressions equivalent? Explain.

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A cup of tea costs $3 at a local cafe. Alan and his wife, Patty, have a coupon for $1 off their orde...