Question

626. 1) 3,8×(-2 3/4)+13 3/5:1,7/(4,3-7,85):7,1​

Answer 1

Ответ:

Первое - 2.55 ( уверен )

Второе -  151 ( Не уверен в этом)

Пошаговое объяснение:

Answer 2

Let's break down the expression step by step:

1. Calculate 3.8 × (-2 3/4):

First, convert the mixed number (-2 3/4) to an improper fraction: -2 3/4 = -8/4 + 3/4 = -11/4

Now, multiply 3.8 by -11/4: 3.8 × (-11/4) = -42.7/4

2. Calculate 13 3/5:

Convert the mixed number 13 3/5 to an improper fraction: 13 3/5 = 65/5 + 3/5 = 68/5

3. Calculate 1.7 / (4.3 - 7.85):

First, subtract 7.85 from 4.3: 4.3 - 7.85 = -3.55

Now, divide 1.7 by -3.55: 1.7 / (-3.55) = -0.4788732 (rounded to 7 decimal places)

4. Finally, divide the result from step 2 by the result from step 3:

(-42.7/4) ÷ (-0.4788732) = 89.274 (rounded to 3 decimal places)

So, the result of the expression is approximately 89.274.