Find x if f(x)=2x+7 and f(x)=-1
1 answer:
You might be interested in
Answer:
th part of the field is covered in the second sprint.
Step-by-step explanation:
A football player is running the length of a 100 yard long football field.
Let player sprints x yards with the speed = 2 yards per second.
So time taken to cover x yards player will take time = seconds
Now rest distance (100 - x) yards when covered with the speed of 4 yards per second, so time taken to cover this distance =
= seconds
Now total time taken by the player can be represented by the equation
Now we can solve this equation for the value of x.
x + 100 = 40×4
x + 100 = 160
x = 160 - 100 = 60 yards
And length of the second part will be = 100 - 60 = 40 yards
Now the fraction of the field covered by the player in second sprint will be
=
= or 40%
Therefore, th part of the field was covered in second sprint.