(Solved): Current Attempt in Progress A phone company charges $23 a month for unlimited talk, text, and 3GB ...

Current Attempt in Progress A phone company charges $$\$23$$ a month for unlimited talk, text, and $$3\mathrm{GB}$$ of data, and $$\$7$$ for every gigabyte of data above $$3\mathrm{GB}$$. Write an expression for the monthly phone charge, $$P$$, in dollars, as a function of the number of gigabytes of data, $$d$$, used that month.