Solve. Write your answer in simplest form.
-Brian was training to run a marathon. During the three-day period before the race he decided that he would train for a total of 12 hours. If he trained for $3 \frac { 2 } { 5 }$ hours on the first day and $3 \frac { 7 } { 10 }$ hours on the second day, how many hours would he need to train on the third day?
A) $4 \frac { 9 } { 10 }$ hours

B) $5 \frac { 1 } { 10 }$ hours

C) 5 hours

D) $5 \frac { 9 } { 10 }$ hours

Question

Solve. Write your answer in simplest form.
-Brian was training to run a marathon. During the three-day period before the race he decided that he would train for a total of 12 hours. If he trained for $3 \frac { 2 } { 5 }$ hours on the first day and $3 \frac { 7 } { 10 }$ hours on the second day, how many hours would he need to train on the third day?
A) $4 \frac { 9 } { 10 }$ hours

B) $5 \frac { 1 } { 10 }$ hours

C) 5 hours

D) $5 \frac { 9 } { 10 }$ hours

Quizplus · Accepted Answer

First, convert the mixed numbers to improper fractions: $3 \frac{2}{5} = \frac{17}{5}$ and $3 \frac{7}{10} = \frac{37}{10}$. Find a common denominator to add them: $\frac{17}{5} = \frac{34}{10}$. Add the fractions: $\frac{34}{10} + \frac{37}{10} = \frac{71}{10}$. Subtract from 12: $12 - \frac{71}{10} = \frac{120}{10} - \frac{71}{10} = \frac{49}{10} = 4 \frac{9}{10}$.

Solve Write Your Answer in Simplest Form 3253 \frac { 2 } { 5 }352​

Solve Write Your Answer in Simplest Form $3 \frac { 2 } { 5 }$