Evaluate 4a-bc if a=7 b=3 c= -2

Its 34 because 7x4=28, and 3 x -2 is -6 and a negative x - negative is positive so you would do 28+6 which is 34

You would plug in your answers and the equation would become 4(7)-(3*-2)=34. You should have known this if you are in high school.