If f(7)=20, write the corresponding ordered pair​

Yo need asap pls ! markin da brainiest too !

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.

You buy a veido game for $60 and the sales tax is 8% what is the total cost for the game including the sales tax