It's 1/4 as fraction and .25 as decimal
Answer:
I think it is 142 I'm not sure if it's right or wrong
(1/3)r + (2/3)r = -2 -1
1r = -3
r = -3
Hope this helps
I figured out the answer Chaseashley24! The answer to your question is:
0.673 m/s²
Hope this helps!
Mean is calculated by adding all numbers and dividing by how many there are. I have set up an equation to find x from the given mean.
![\frac{12.5 -10 -7.5 + x}{4} = 11.5](https://tex.z-dn.net/?f=%20%5Cfrac%7B12.5%20-10%20-7.5%20%2B%20x%7D%7B4%7D%20%3D%2011.5%20)
To cancel out the denominator, multiply both sides by 4.
![4(\frac{12.5 -10 -7.5 + x}{4}) = 4(11.5)](https://tex.z-dn.net/?f=%204%28%5Cfrac%7B12.5%20-10%20-7.5%20%2B%20x%7D%7B4%7D%29%20%3D%204%2811.5%29%20)
When that is done, you are left with:
![12.5 -10 -7.5 + x = 46](https://tex.z-dn.net/?f=%2012.5%20-10%20-7.5%20%2B%20x%20%3D%2046%20)
Combine like terms:
![-5 + x = 46](https://tex.z-dn.net/?f=%20-5%20%2B%20x%20%3D%2046%20)
Add 5 to both sides, cancelling out the -5 on the left.
![x = 51](https://tex.z-dn.net/?f=%20x%20%3D%2051%20)
Your answer is 51.
If you want to check your work, plug in 51 for x.
![\frac{12.5 - 10 - 7.5 + 51}{4} = 11.5](https://tex.z-dn.net/?f=%20%5Cfrac%7B12.5%20-%2010%20-%207.5%20%2B%2051%7D%7B4%7D%20%3D%2011.5%20)
![\frac{46}{4} = 11.5](https://tex.z-dn.net/?f=%20%5Cfrac%7B46%7D%7B4%7D%20%3D%2011.5%20)