Question

( 1/7 y + 2/49y ) *49 если y = 1/9​

Answer 1

Ответ:

Пошаговое объяснение:

(1/7y +2/49y)*49= 7y+2y= 9y

9*1/9= 1

Answer 2

Ответ:

1

Пошаговое объяснение:

Раскроем скобки, получим:

1/7y*49+2/49y*49=7y+2y=9y

Если y=1/9, то 9y=1/9 * 9 = 1

Answer 3

To simplify the expression (1/7y + 2/49y) * 49 when y = 1/9, we first substitute the value of y into the expression and then perform the calculations step by step.

Given: y = 1/9

Now, let's substitute the value of y into the expression:

(1/7 * (1/9) + 2/49 * (1/9)) * 49

Next, simplify each term inside the parentheses:

(1/7 * 1/9 + 2/49 * 1/9) * 49

Now, multiply the fractions:

(1/63 + 2/441) * 49

Now, find a common denominator for the fractions inside the parentheses:

(1/63 + 2/441) * 49

To add fractions with different denominators, we need to find a common denominator, which in this case is 441:

(7/441 + 2/441) * 49

Now, add the fractions:

(9/441) * 49

Now, multiply the fraction by 49:

(9/441) * 49 = 441/441

And finally, simplify the fraction:

441/441 = 1

So, the simplified expression is 1.