Question

6(1,2a-0,8)-3,6a +7,2 при а=-0,5​

Answer 1

Ответ:

- 4,8

Пошаговое объяснение:

7,2 а - 4,8 - 3,6 + 7,2 = 7,2 а - 1,2

при а = - 0,5

7,2 * (-0,5) - 1,2 = - 3,6 - 1,2 = - 4,8

Answer 2

To evaluate the expression 6(1,2a-0,8)-3,6a +7,2 when a = -0.5, we substitute the value of a into the expression and perform the calculations.

Let's substitute a = -0.5 into the expression:

6(1,2(-0,5)-0,8) - 3,6(-0,5) + 7,2

First, let's simplify the expression inside the parentheses:

1.2(-0.5) - 0.8 = -0.6 - 0.8 = -1.4

Now we substitute this value back into the expression:

6(-1.4) - 3.6(-0.5) + 7.2

Now, let's calculate each term separately:

6(-1.4) = -8.4 3.6(-0.5) = -1.8

Substituting these values into the expression:

-8.4 - (-1.8) + 7.2

To simplify the expression, we can remove the double negative:

-8.4 + 1.8 + 7.2

Now we add the numbers together:

-6.6 + 7.2 = 0.6

Therefore, when a = -0.5, the expression 6(1,2a-0,8)-3,6a +7,2 evaluates to 0.6.