Jesse, max, and kalel each ate 0.32 of a pizza pie. which number shows the best estimate of how much of the pie they ate together? a) 1.0 b)0.5 c)0.25 or d)0.10

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?