A triangle has side lengths of 16cm and 5cm. Which could be the value of the third slide, 24cm or 17cm

Divide reduce the answer to lowest term 3/7 divided 1 1/6

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Which pair of expressions is equivalent? a 7(1–k)and7–k b 7(1–k)and1–7k c 7(1–k)and7–k d 7(1–k)and7–7k