Mattie, joel, and oscar each ate 325 calories at lunch each day for 18 days. about how many calories did they eat in all

Math question.. plz me .. best answer all

50 will mark show all use the linear combination method to solve the system of equations. explain each step of your solution. if steps are not explained, you will not receive credit for that step. 2x+9y= -26 -3x-7y=13

Astocks price gained 3% in april and 5% in may and then lost 4% in june and 1% in july during which month did the stocks price change the most