Question

2:7=10:y решите пропорцию пжж

Answer 1

2/7=10/y
2y=10*7
2y=70
Y=70/2
Y=35

Answer 2

$\frac{2}{7} = \frac{10}{y}$

2y=10*7
2y=70
y=35

Answer 3

To solve this proportion, you can use cross-multiplication. This involves multiplying the numerator of one ratio by the denominator of the other ratio, and then setting the two products equal to each other.

In this case, we have:

2:7 = 10:y

Multiplying 7 by 10, we get:

7 x 10 = 70

So, the proportion becomes:

2 : 7 = 10 : y 2 x y = 7 x 70

Simplifying the right side, we have:

2y = 490

Dividing both sides by 2, we get:

y = 245

Therefore, the solution is y = 245.