If 10.2 is tax and $61.58 is the total how much is total without tax?

Taking algebra two apex courses and need with these questions

Which of the following is true about the graph of f(x)=7^x. select all that apply. a= it intercepts the x axis b=it intercepts both axis c=it intercepts neither d=it intercepts the y axis

If you are trying to move an attached term across the equal sign (=), what operation would you use to move it?