Question

-3.9*4/7+3/7*(-3.9)=?

Answer 1

=-3,9·(4/7+3/7)=-3,9·1=-3,9

Answer 2

To solve this expression, we follow the order of operations, which is commonly known as PEMDAS (Parentheses, Exponents, Multiplication and Division, and Addition and Subtraction).

Using PEMDAS, let's calculate the expression step by step:

-3.9 * 4 = -15.6 -15.6 / 7 = -2.22857142857 (rounded to 11 decimal places)

3 / 7 = 0.42857142857 (rounded to 11 decimal places)

-2.22857142857 * 0.42857142857 = -0.954285714286 (rounded to 12 decimal places)

Therefore, the value of the expression is approximately -0.954285714286.