Question

Some of the students at Kahlo Middle School like to ride their bikes to and from school. They always ride unless it rains. Let d be the distance in miles from a student's home to the school. Write two different expressions that represent how far a student travels by bike in a four week period if there is one rainy day each week.

Answer 1

32d

Explanation:

-The students ride their bikes to and from school every day. The distance is thus;

`d_t=2d`

-Taking that there are 5 school days per week and that it rains in one per week. the total number of days is:

`Days=Days \ per \ week * \ number \ of \ weeks\\\\=(5-1)* 4\\\\=16\ days`

Now, we multiply the distance per day by the total number of days:

`Distance, D=2d* 16\\\\=32d`

Hence, the total distance in a 4-week period is expressed as 32d ( where d is the distance from home to school).