Question

Josh Is 9 years old and 129 cm tall. Medical chart shows that a boy's height at age 9 is 3/4 of his predicted adult height. Predict Josh's Adult height

Answer 1

172 cm

Explanation:

a=Adult height. n=9 year-old height

a*3/4=n

a*3/4=129

a*3/4 / 3/4 = 129 / 3/4

a = 129 * 4/3 ==> dividing by a number is equal to multiply by its reciprocal

a = 516/3

a = 172 cm