Question

0.9(-2,5+5 2/3÷8,5а)-2/3×4.5(2.5+0,2а)​

Answer 1

Ответ:

вот в картинке есть

Пошаговое объяснение:

вот 2 задача  6,75×4 8/9(1-5b)+68(1+2b)+12 3/7 ÷ 3/14×0.5b=

Answer 2

To simplify the expression, let's break it down step by step:

1. Start with the expression inside the parentheses:

   • 5 2/3 = 17/3 (convert the mixed number to an improper fraction).
   • 0.2a

2. Now, calculate the division:

   • 17/3 ÷ 8.5a = (17/3) / (8.5a) = (17/3) * (1 / 8.5a) = (17/3) * (1 / 8.5) * (1/a) = (17/3) * (2/17) * (1/a) = (2/3) * (1/a) = 2/3a

3. Moving to the second part of the expression:

   • 2/3 × 4.5 = (2/3) * 4.5 = 3

4. Add the two results together:

   • 0.9(-2 + 2/3a) - 3

5. Distribute 0.9 into the parentheses:

   • 0.9 * (-2) + 0.9 * (2/3a) - 3

6. Simplify further:

   • (-1.8) + (0.6a) - 3

7. Finally, combine like terms:

   • (-1.8 - 3) + 0.6a

8. Calculate the final result:

   • (-4.8) + 0.6a

So, the simplified expression is -4.8 + 0.6a.