Question

-4(2,5а-1,5)+5,5а-8 при а=-2/9​

Answer 1

Ответ:

-1

Объяснение:

-4,5а-2 при а=-2/9: 45*2/10*9-2=1-2=-1

Answer 2

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Answer 3

To evaluate the expression $-4(2.5a - 1.5) + 5.5a - 8$ when $a = -\frac{2}{9}$, follow these steps:

1. Substitute the value of $a$ into the expression: $-4(2.5 \cdot (-2/9) - 1.5) + 5.5 \cdot (-2/9) - 8$

2. Perform the arithmetic calculations within the parentheses: $-4\left(-\frac{5}{9} - 1.5\right) - \frac{11}{9} - 8$

3. Continue with the calculations inside the parentheses: $-4\left(-\frac{23}{9}\right) - \frac{11}{9} - 8$

4. Multiply -4 by $-\frac{23}{9}$: $\frac{92}{9} - \frac{11}{9} - 8$

5. Combine the fractions: $\frac{81}{9} - 8$

6. Simplify the fraction: $9 - 8$

7. Subtract 8 from 9: $1$

So, when $a = -\frac{2}{9}$, the expression $-4(2.5a - 1.5) + 5.5a - 8$ evaluates to $1$.