Minh is 16. his parents are both the same
age. the three of them have lived a total
of 100 years. how old are his parents?

The parents age 42 years old

Explanation:

Let the age of Minh’s father be x years

Given, his mother is of same age as of his father

Then, his mother’s age is x years

According to question,  

Minh’s age + His father + His mother = 100

16 + x + x = 100

16 + 2x = 100

2x = 84

x = 42

Therefore, both, minh’s father and his mother is 42 years old

step-by-step explanation:

the true ones are a b and d

step-by-step explanation:

let pq = qr = rs = x, and xz = y and zu = z.

if the horizontal lines are parallel, then corresponding segments are in proportion:

substitute:

therefore 3 = y = z.

xu = y + z → xu = 3 + 3 = 6