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Please help plse help I need for assignment

Look at triangle wxy what is the length (in centimeters) of the side wy of the triangle?

Is a square always, sometimes, or never a parallelogram

Sam opened a money-market account that pays 3% simple interest. he started the account with $7,000 and made no further deposits. when he closed the account, he had earned $420 in interest. how long did he keep his account open?