Raju bought a book for rs 35.65. he gave rs 50 to the shopkeeper. how much
money did he get back from the shopkeeper?

Give the equations of two different lines that are perpendicular to the line 3x + 4y = 7.

Can some one me with these questions

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.