Four cheeseburgers and 3 orders of french fries cost $28.80. Two cheeseburgers and 4 order of fries costs $21.40. How much does an order of fries cost?

Prove that the sum of two consecutive exponents of the number 5 is divisible by 30.if two consecutive exponents are 5n and 5n + 1, then their sum can be written as 30.

The base of a triangle exceeds the height by 9 inches. if the area is 180 square inches, find the length of the base and the height of the triangle.

If sr is 4.5cm and tr is 3cm, what is the measure in degrees of angle s?