How do i solve 2.06 + [(3/5 - 1/2) × 2.5] ÷ 5

Given that ot =5, xt=12, and ox= 13 is xy tangent to circle o at t? explain.

Write the expression in complete factored form. 5n_(c - 3) - n(c - 3) =

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?