Ms. Hernández had a hole in her coin purses he lost 1 quarter and 1 dime everyday, at the end of 2 weeks she has 1 dime left. How much money did she begin with

Suppose a ball is dropped fromca height of 6ft. it bounces back up but time it bounces, it reaches only 7/10 of its pervious height. what is the total of each height that the ball reaches after 5 bounces

Offering 30 if a plus b plus c equals 68 and ab plus bc plus ca equals 1121, where a, b, and c are all prime numbers, find the value of abc. the answer is 1978 but i need an explanation on how to get that.

What is the gcf of 20c^3-5c^4+30c^6