Question

X=1/3*(40 4/7-38 1/3):2 5/7иz=(51,4-50,8)*20/27?​

Answer 1

Ответ:

Пошаговое объяснение:

Answer 2

To solve the expressions, let's first simplify each part step-by-step:

1. X = 1/3 * (40 4/7 - 38 1/3) : 2 5/7

Step 1: Convert mixed numbers to improper fractions: 40 4/7 = (7 * 40 + 4)/7 = 284/7 38 1/3 = (3 * 38 + 1)/3 = 115/3

Step 2: Subtract the fractions inside the parentheses: 284/7 - 115/3

To subtract fractions, they need a common denominator. The common denominator for 7 and 3 is 21.

Step 3: Convert both fractions to have a denominator of 21: (284/7) * (3/3) = 852/21 (115/3) * (7/7) = 805/21

Step 4: Subtract the fractions: 852/21 - 805/21 = 47/21

Step 5: Now, divide by 2 5/7: To divide fractions, we multiply by the reciprocal of the second fraction.

2 5/7 = (7 * 2 + 5)/7 = 19/7

Now, we can divide: (47/21) ÷ (19/7) = (47/21) * (7/19) = 329/399

So, X = 329/399.

2. z = (51.4 - 50.8) * 20/27

Step 1: Perform the subtraction: 51.4 - 50.8 = 0.6

Step 2: Multiply by 20/27: 0.6 * (20/27) = 12/27 = 4/9

So, z = 4/9.

In conclusion: X = 329/399 z = 4/9