Question

The total height of Tacy, John, and Alexxa is 350cm. John, the tallest, is 130cm in height. Tacy is 30cm shorter than John. Alexxa is 20cm taller than Tacy.

Answer 1

John's height = 130 cm

Alexa's height = 120 cm

Tacy's height = 100 cm

Explanation:

We are given the falling in the question:

John's height = 130 cm

The total height of Tacy, John, and Alexa is 350 cm

Let x be Tacy's height and y be Alexa's height.

Thus, we can write the equation:

`x + y +130 = 350\\x + y = 220`

Tacy is 30 cm shorter than John.

Thus, Tacy's height =

`x = 130 - 30\\x=100\text{ cm}`

Thus, Tacy is 100 cm tall.

Alexa is 20 cm taller than Tacy.

Thus, Alexa's height

`y=100 + 20\\y=120\text{ cm}`

Thus, the height are:

John's height = 130 cm

Alexa's height = 120 cm

Tacy's height = 100 cm