State the domain: a) 1/x

How many lines can be drawn through points j and k? 0 1 2 3

The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?

The functions f(x) and g(x) are shown in the graph f(x)=x^2 what is g(x) ?