E^x + 3e^-x = 4 find the exact solutions to the equations

2/3(-6y+9x) expand each expression using the distributive property

Aclassmate thinks that solving a system by graphing gives an exact answer when the lines appear to cross at a grid point, but only an approximate answer when they don't. explain why this isn't true.

Identify the parent function that can be used to graph the function f(x)=3(x-9)2