Answer: -10
Step-by-step explanation:
Using the order of operations, we start with the operations inside the parentheses first, following the acronym PEMDAS (Parentheses, Exponents, Multiplication and Division, Addition and Subtraction).
Add the numbers inside the first set of parentheses:
0.4 + 0.8 = 1.2
Multiply the result of step 1 by 2:
1.2 x 2 = 2.4
Multiply -4 by -3.1:
(-4) x (-3.1) = 12.4
Subtract the result of step 3 from the result of step 2:
2.4 - 12.4 = -10
Therefore, (0.4 +0.8) * 2 - (-4) * (-3.1) = -10.
I hope this helped!
~~~Harsha~~~