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belka [17]
3 years ago
14

Solve for y a. 7 cmb. 20 cmc. 14 cmd. 10 cm​

Mathematics
1 answer:
Rainbow [258]3 years ago
7 0

Answer:

20 cm

Step-by-step explanation:

We can use ratios to solve

We know x = 7 since they are of equal length

x          x+7

----- = -------

10         y

7          7+7

----- = -------

10         y

Using cross products

7y = 14*10

7y = 140

Divide by 7

7y/7 = 140/7

y = 20

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