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opposite sides of a parallelogram are equal in length. this attribute of a parallelogram is true of a quadrilateral and true of a rectangle.

Ihonestly don’t understand this at all

The late fee for library books is $2.00 plus 15¢ each day for a book that is late. if maria’s fee for a late book was $3.20, write and solve a linear equation to find how many days late the book was.

Twice the sum of a number and 4 is equal to three times the difference of the number and 7. find the number.