Question

Please help, its homework not finished

Answer 1

1) -0.4

2) 3

3) -37

For each I just subsitubed

1) 3(1.2)-4

 3.6-4 = -0.4

2) 12-(9)=3

3) 4(2)-45

  8-45=-37

Answer 2

1) -0.4

2) 3

3) -37

For each I just subsitubed

1) 3(1.2)-4

3.6-4 = -0.4

2) 12-(9)=3

3) 4(2)-45

 8-45=-37

that is the answer