Question

On a car trip Sam drove $m$ miles, Kara drove twice as many miles as Sam, and Darin drove $20$ fewer miles than Kara. In terms of $m$ , how many miles did Darin drive?

• A. $2m+20$
• B. $2m-20$
• C. $\frac{m}{2}+20$
• D. $\frac{m+20}{2}$

Answer 1

Answer: (B)

$2m-20$

Given that

Number of miles driven by $Sam$ $=$ $m$

As $Kara$ drove twice as many miles as $Sam$,

Number of miles drove by $Kara$ $=$ $2m$

As $Darin$ drove 20 fewer miles than $Kara$,

Hence, Number of miles drove by $Darin$ $=$ Number of miles drove by $Kara$ $-$ $20$

$=$ $2m$ $-$ $20$

Therfore, $Darin$ drove ${}^{\prime }2m$ $-$ ${20}^{\prime }$ miles.