Question

-4(2.5a-1.5)+5.5a-8 при a=-0.2​

Answer 1

Ответ:

-10a+5+5.5a-8=

-4.5a-3

-4.5*(-0.2)-3=-2.1

Answer 2

To evaluate the expression -4(2.5a-1.5)+5.5a-8 when a = -0.2, we substitute the value of a into the expression and perform the necessary calculations.

Let's calculate step by step:

-4(2.5a - 1.5) + 5.5a - 8

Replace a with -0.2:

-4(2.5(-0.2) - 1.5) + 5.5(-0.2) - 8

Simplify the expression inside the parentheses:

-4(-0.5 - 1.5) + 5.5(-0.2) - 8

Perform the calculations inside the parentheses:

-4(-2) + 5.5(-0.2) - 8

Multiply the values:

8 + (-1.1) - 8

Combine like terms:

(-1.1)

Therefore, when a = -0.2, the value of the expression -4(2.5a-1.5)+5.5a-8 is -1.1.