Please hurry I’m not looking forward to failing

Mp model with mathematics explain how the number of text messages dario sent and the cost form an arithmetic sequence.then write an expression to find dario's text messaging bill if he sends n text messages over 250.

Solve the equation using the given values: x= -2.5; y= -7.51. 2xy + 2x²

Which conjunction is disjunction is equivalent to the given absolute value inequality? |x+2|< 18