If a and b are integers, the least common multiple of a and b, written as [a, bJ, is defined as that positive integer d such that (a) a I d and b I d. (b) Whenever a I x and b I x then d I x. Prove that [a, bJ exists and that [a, bJ

This is geometry. could anyone ? i can't fail this class. my grade is quite low already.

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.

Evaluate the expression. (9 + 5)(3 + 2)0