Abag contains purple marbles and white marbles, 111 in total. the number of purple marbles is 9 more than 5 times the number of white marbles. how many purple marbles are there?

Based on what i know about mean, this doesn't add up.

Tim's phone service charges $23.06 plus an additional $0.22 for each text message sent per month. if tim's phone bill was $28.56, which equation could be used to find how many text messages, x, tim sent last month?

If f(x)=-x^2+6x-1 and g(x)=3x^2-4x-1,find(f+g)(x)