Isabelle takes a piece of wood that is 7/10 of an inch thick and glues it to a piece of wood that is 2 inches thick. Together, what is the thickness of the two pieces of wood? Write your answer as a fraction or as a whole or mixed number.

The system of equations graphed below has how many solutions?

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?

60 musicians applied for a job at a music school. 14 of the musicians play both guitar and drums, 28 play drums, 18 play the guitar. what is the probability that the applicant who gets the job plays drums or guitar?