The gas meter readings at the beginning and end of a period were: 8247 & 8631, the cost of each unit was 11p, there is also a fixed charge of £25.57, Calculate the cost of the gas. Show your working.

Hector and alex traded video games. alex gave hector one fourth of his video games in exchange for 6 video games. then he sold 3 video games and gave 2 video games to his brother. alex ended up with 16 video games. how many video games did alex have when he started?

Let event a = you roll an even number on the first cube. let event b = you roll a 6 on the second cube. are the events independent or dependent? why?

In the diagram below, abc is congruent to dec what is the value of x