Free 25 points and 1 math answer
1 answer:
You might be interested in
The time needed to run the second half of the race is 8.44 s
Step-by-step explanation:
The total distance covered by the athlete during the race is
d = 200 m
And the total time taken to cover this distance is
T = 19.19 s
We also know that the time the athlete needs to cover the first half of the race is
Also, we know that
where is the time the athlete takes to cover the second half of the race.
Re-arranging this equation and susbtituting the values, we find the value of t2:
Learn more about uniform motion:
#LearnwithBrainly
The perimeter of the triangle is 15.4 units.
<u>Step-by-step explanation:</u>
The triangle has vertices at (-1,5), (4,2), and (0,0).
To find the perimeter of the triangle, you need to find the distance of the three points which is the length of the three sides of the triangle.
Let us consider the points as A (-1,5) and B (4,2) and C (0,0).
<u>The distance formula is given by :</u>
⇒
<u>Distance of AB :</u>
A (-1,5) ⇒ (x1,y1)
B (4,2) ⇒ (x2,y2)
⇒
⇒
⇒
⇒
⇒ 5.8
∴ The length of the side AB of the triangle is 5.8 units.
<u>Distance of BC :</u>
B (4,2) ⇒ (x1,y1)
C (0,0) ⇒ (x2,y2)
⇒
⇒
⇒
⇒ 4.5
∴ The length of the side BC of the triangle is 4.5 units.
<u>Distance of CA :</u>
C (0,0) ⇒ (x1,y1)
A (-1,5) ⇒ (x2,y2)
⇒
⇒
⇒
⇒ 5.1
∴ The length of the side CA of the triangle is 5.1 units.
Now, the perimeter of the triangle is given by :
Perimeter = Sum of the lengths of all three sides of the triangle.
⇒ 5.8 + 4.5 + 5.1
⇒ 15.4 units.
∴ The perimeter of the triangle is 15.4 units.