Vector AC and vector BD are the diagonals of parallelogram ABCD prove that vector AC+BD=2BC

If a baby uses 15 diapers in 2 days, how many diapers will the baby use in a year?

Pyotr tchaikovsky sporting goods operates on a 45% overhead based on the selling price, which results in an overhead of $65.34 on the newest version of an air hockey game set. if the air hockey game set costs pyotr tchaikovsky sports $49.32, find the selling price, the markup, and the net profit.

Complete the solution of the equation. find the value of y when x equals to 28 x+3y=28