Question

Solve for y
a. 7 cm
b. 20 cm
c. 14 cm
d. 10 cm​

Answer 1

20 cm

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