F(x)=2^x-3x and g(x)=1-2x find (f+g)

Tim's phone service charges $26.39 plus an additional $0.21 for each text message sent per month. if tim's phone bill was $31.64, which equation could be used to find how many text messages, x, tim sent last month?

Determine if the equation defines y as a function of x: 2xy = 1. yes o no

Which statements are true about additional information for proving that the triangles are congruent check all that apply