Question

- 8(0,5а - 1,5) + 5,5а - 8, при а = - 2/5

Answer 1

Ответ:

3 2/5=3,4

Объяснение:

-4а+12+5,5а-8=1,5а+4

При а= -2/5

1,5=15/10

15/10•(-2/5)+4=-30/50+4=-3/5+4=3 2/5 =3,4

Answer 2

To solve this expression, we can substitute the value of "a" with the given value (-2/5) and then perform the calculations step by step.

Given expression: 8(0.5a - 1.5) + 5.5a - 8 Given value: a = -2/5

Substitute the value of "a": 8(0.5 * (-2/5) - 1.5) + 5.5 * (-2/5) - 8

Now, perform the calculations within parentheses: 8(-1 + 1.5) - 11/2 - 8

Continue with multiplication and addition/subtraction: 8(0.5) - 11/2 - 8 4 - 11/2 - 8 8/2 - 11/2 - 16/2 -3/2 - 16/2 -19/2

So, when a = -2/5, the value of the expression is -19/2 or -9.5.