The track team is trying to reduce their time for a relay race. first they reduce their time by 2.1 minutes. then they are able to reduce their time by 1/10. if their final time is 3.96 minutes what was their beginning time?

Their beginning time was 16.06 minutes.

Step-by-step explanation:

The track team is trying to reduce their time for a relay race.

First they reduce their time by 2.1 minutes, take it as . Then they are able to reduce that time by 10 minutes, take it as . Let ‘X’ be the time in minutes at the beginning.

Given that their final time is 3.96 minutes, then their beginning time can be calculated as below,

By substituting the values, we get

Hence, their beginning time was 16.06 minutes.

according to the triangle sum theorem, all the angles in a triangle must add up to 180 degrees. if we know one angle is already 90, we do 180-90=90. the other 2 angles must add up to 90, exactly.

step-by-step explanation: