Question

6,57:(x + 0,2)+7,56:(x + 0,2) при x равном: 1) 0,3 2) 0,7 3) 1,8

Answer 1

1) 6,57 ÷ (× + 0,2) + 7,56 ÷ (× + 0,2) , если × = 0,3, тогда

6,57 ÷ (0,3 + 0,2) + 7,56 ÷ (0,3 + 0,2) = 28,26

1. 0,3 + 0,2 = 0,5

2. 6,57 ÷ 0,5 = 13,14

3. 7,56 ÷ 0,5 = 15,12

4. 13,14 + 15,12 = 28,26

2)6,57 ÷ (× + 0,2) + 7,56 ÷ (× + 0,2) , если × = 0,7 , тогда

6,57 ÷ (0,7 + 0,2) + 7,56 ÷ (0,7 + 0,2) =15,7

1. 0,7 + 0,2 = 0,9

2. 6,57 ÷ 0,9 = 7,3

3. 7,56 ÷ 0,9 = 8,4

4. 7,3 + 8,4 = 15,7

3) 6,57 ÷ (× + 0,2) + 7,56 ÷ (× + 0,2) , если × = 1,8 , тогда

6,57 ÷ (1,8 + 0,2) + 7,56 ÷ (1,8 + 0,2) = 7,065

1. 1,8 + 0,2 = 2

2. 6,57 ÷ 2 = 3,285

3. 7,56 ÷ 2 = 3,78

4. 3,285 + 3,78 = 7,065

Answer 2

To find the value of the expression $6.57 \times \frac{x + 0.2}{7.56 \times (x + 0.2)}$ for different values of $x$, we'll plug in each value of $x$ given (0.3, 0.7, and 1.8) one by one.

1. When $x = 0.3$: $6.57 \times \frac{0.3 + 0.2}{7.56 \times (0.3 + 0.2)}$

Calculating the expression: $6.57 \times \frac{0.5}{7.56 \times 0.5}$ $6.57 \times \frac{0.5}{3.78}$ $6.57 \times 0.13227513227513227$ (rounded to 14 decimal places) Result: 0.8691588785046729 (rounded to 16 decimal places)

2. When $x = 0.7$: $6.57 \times \frac{0.7 + 0.2}{7.56 \times (0.7 + 0.2)}$

Calculating the expression: $6.57 \times \frac{0.9}{7.56 \times 0.9}$ $6.57 \times \frac{0.9}{6.804}$ $6.57 \times 0.13235313235313237$ (rounded to 14 decimal places) Result: 0.8700967741935484 (rounded to 16 decimal places)

3. When $x = 1.8$: $6.57 \times \frac{1.8 + 0.2}{7.56 \times (1.8 + 0.2)}$

Calculating the expression: $6.57 \times \frac{2}{7.56 \times 2}$ $6.57 \times \frac{2}{15.12}$ $6.57 \times 0.13214285714285715$ (rounded to 14 decimal places) Result: 0.8696774193548387 (rounded to 16 decimal places)

So, the results are:

1. $x = 0.3$: 0.8691588785046729
2. $x = 0.7$: 0.8700967741935484
3. $x = 1.8$: 0.8696774193548387