10 students have a mean height of 140 cm. One of the students has a height of 95 cm. What is the mean height of the other 9 students?​

An investment decreases in value by 30% in the first year and decreases by 40% in the second year. what is the percent decrease in percentage in the investment after two years

Can you me with this question? i'll reward *30 points i just need with this one question so that i could solve the others. * edit: i originally set up the question to reward 30 points, but for some reason i can only reward 15. if you don't get 30, then i'm sorry. i'm still kind of new to this site

Simplify the expression below -3(10x+4y)+6(6x-2y)