Genes/Dna............................
Answer:
There are 14 horses and 21 chickens.
Step-by-step explanation:
First, you have to make expression for horse and chicken. So we can let x be the number of horses and y will be the number of chickens. Next, given that the total number of feet for both animals is 98 so you have to make simultaneous equation :
![4x + 2y = 98](https://tex.z-dn.net/?f=4x%20%2B%202y%20%3D%2098)
( horse has 4 feet and chicken has 2 feet )
There are a total of 35 heads so the other equation will be :
![x + y = 35](https://tex.z-dn.net/?f=x%20%2B%20y%20%3D%2035)
Lastly, you have to solve it :
![4x + 2y = 98](https://tex.z-dn.net/?f=4x%20%2B%202y%20%3D%2098)
![2(2x + y) = 98](https://tex.z-dn.net/?f=2%282x%20%2B%20y%29%20%3D%2098)
![2x + y = 49 - - - (1)](https://tex.z-dn.net/?f=2x%20%2B%20y%20%3D%2049%20-%20%20-%20%20-%20%281%29)
![x + y = 35 - - - (2)](https://tex.z-dn.net/?f=x%20%2B%20y%20%3D%2035%20-%20%20-%20%20-%20%282%29)
![(1) - (2)](https://tex.z-dn.net/?f=%281%29%20-%20%282%29)
![2x + y - x - y = 49 - 35](https://tex.z-dn.net/?f=2x%20%20%2B%20y%20-%20x%20-%20y%20%3D%2049%20-%2035)
![x = 14](https://tex.z-dn.net/?f=x%20%3D%2014)
![substitute \: x = 14 \: into \: (2)](https://tex.z-dn.net/?f=substitute%20%5C%3A%20x%20%3D%2014%20%5C%3A%20into%20%5C%3A%20%282%29)
![14 + y = 35](https://tex.z-dn.net/?f=14%20%2B%20y%20%3D%2035)
![y = 35 - 14](https://tex.z-dn.net/?f=y%20%3D%2035%20-%2014)
![y = 21](https://tex.z-dn.net/?f=y%20%3D%2021)
3/2. Just find a point and count 3 up right 2
Answer: 16
Step-by-step explanation:
From the question, we are informed that there are 25 markers in a bag: 5 red, 5 yellow, 5 blue, 5 green, 5 purple and that one marker is drawn out of the bag, then put back in.
The probability of picking a blue marker will be: = 5/25 = 1/5
Therefore, the number of times that a blue marker will be expected to be picked in 80 draws would be:
= 1/5 × 80
= 16 times
Step-by-step explanation:
-3p+6p is 3p
-3 + 6 = 3
So when you simplify the equation you get 3p