Question

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

Answer 1

Answer:

29

Step-by-step 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

Answer 2

Answer:

 $\huge\boxed{29}$

Solution Steps:

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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:

• $32-3=29$

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