1, Which one of the following statement is true?
A Quadrilateral is a four-side geometric figure bounded by line segment.
B. Diagonal is a line segment that connects two opposite vertices.
C. Adjacent sides are sides of geometric figure that have a common end point
D. All of the above.

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.

Aquadratic equation in standard from is written ax^2= bx+c, where a,b and c are real numbers and a is not zero?

The price of a dozen eggs was $1.63. suppose the price increases m dollars per dozen and then the price decreases $0.12 per dozen. which expression represents the current price of eggs after the two price changes?