Question

2х - (-8, 4) + 2,9 . (-2) при х = -4.​

Answer 1

Ответ:

-5,4

Пошаговое объяснение:

2х - (-8, 4) + 2,9 . (-2) =2х+8,4-5,8=2х+2,6=2*(-4)+2,6=-8+2,6=-5,4

Answer 2

To evaluate the expression 2x - (-8.4) + 2.9 * (-2) when x = -4, follow these steps:

1. Replace x with -4 in the expression: 2*(-4) - (-8.4) + 2.9 * (-2)

2. Perform the operations following the order of operations (PEMDAS/BODMAS): PEMDAS: Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right).

   2*(-4) = -8 -(-8.4) = 8.4 (double negative becomes positive) 2.9 * (-2) = -5.8

3. Now, the expression becomes: -8 + 8.4 - 5.8

4. Finally, perform the addition and subtraction: -8 + 8.4 = 0.4 0.4 - 5.8 = -5.4

The final result is -5.4.