Question

-3mn+4m-3 when m=2 and n=-4

Answer 1

`\huge\boxed{29}`

Solution Steps:

______________________________

1.) Fill in the variables with the information given:

• 
  `-3(2)(-4)+4(2)-3`

- M = 2

- N = -4

2.) Multiply:

• 
  `-3` ×
  `2=-6`

• 
  `4` ×
  `2=8`

- The reason we multiply first is due to Order of Operations or PEMDAS: Parenthesis, Exponents, Multiplication, Division, Addition, Subtraction.

- When we see y(x) this just means whatever number or variable is before the parenthesis, you multiply it by that.

Equation at the end of Step 2:

• 
  `-6(-4)+8-3`

3.) Multiply again:

• 
  `-6` ×
  `-4=-24`

- We do this once more because we had one last parenthesis.

Equation at the end of step 3:

• 
  `24+8-3`

4.) Add:

• 
  `24+8=32`

Equation at the end of Step 4:

• 
  `32-3`

5.) Subtract:

• 
  `32-3=29`

______________________________

Answer 2

29

Explanation:

m = 2 and n = -4

-3mn + 4m - 3

-3(2)(-4) + 4(2) - 3

-6(-4) + 8 - 3

24 + 8 - 3

32 - 3 = 29