Question

Martina is 3 inches less than twice as tall as her little brother. Writer an expression for martinas height. How tall is martina if her little brother is 28 inches tall

Answer 1

Martina's height would be
`2x`.

56 inches.

Explanation:

Let x represent Height of Martina's brother.

We have been given that Martina is 3 inches less than twice as tall as her little brother. So Martina's height would be 2 times x.

Martina's height would be
`2x`.

Therefore, our required expression would be
`2x`.

To find Martina's height when his brother is 28 inches, we will substitute
`x=28\text{ inch}` in expression for Martina's height as:

`2x\Rightarrow 2(28\text{ inches})=56\text{ inches}`

Therefore, Martina's height is 56 inches.