Solve by the substitution method

2x + 9y=41
- 4x + y=13

James is playing his favorite game at the arcade. after playing the game 3 times, he has 8 tokens remaining. he initially had 20 tokens, and the game costs the same number of tokens each time. the number tt of tokens james has is a function of gg, the number of games he plays

Write the rational number in lowest terms 99/-15

Write a function for a rotation 90 degrees counter clockwise about the origin, point 0