If they both did it together it should only take them about 20 to 25 to complete it
Answer:
3
Step-by-step explanation:
It's given that ΔDEF ∼ΔXYZ . So the corresponding sides of both triangles will be proportional to each other.
![= > \frac{de}{xy} = \frac{ef}{yz} = \frac{df}{xz}](https://tex.z-dn.net/?f=%20%20%3D%20%20%3E%20%5Cfrac%7Bde%7D%7Bxy%7D%20%20%3D%20%20%20%20%5Cfrac%7Bef%7D%7Byz%7D%20%20%3D%20%20%5Cfrac%7Bdf%7D%7Bxz%7D%20)
DE = 4 ; XY = 4(n + 1) ; EF = 5 ; YZ = 7n - 1
Putting all these values gives ,
![\frac{4}{4(n + 1)} = \frac{5}{7n - 1}](https://tex.z-dn.net/?f=%20%5Cfrac%7B4%7D%7B4%28n%20%2B%201%29%7D%20%20%3D%20%20%5Cfrac%7B5%7D%7B7n%20-%201%7D%20)
![= > \frac{1}{n + 1} = \frac{5}{7n - 1}](https://tex.z-dn.net/?f=%20%3D%20%20%3E%20%20%5Cfrac%7B1%7D%7Bn%20%2B%201%7D%20%20%3D%20%20%5Cfrac%7B5%7D%7B7n%20-%201%7D%20)
![= > 7n - 1 = 5(n + 1)](https://tex.z-dn.net/?f=%20%3D%20%20%3E%207n%20-%201%20%3D%205%28n%20%2B%201%29)
![= > 7n - 1 = 5n + 5](https://tex.z-dn.net/?f=%20%3D%20%20%3E%207n%20-%201%20%3D%205n%20%2B%205)
![= > 7n - 5n = 5 + 1](https://tex.z-dn.net/?f=%20%3D%20%20%3E%207n%20-%205n%20%3D%205%20%2B%201)
![= > 2n = 6](https://tex.z-dn.net/?f=%20%3D%20%20%3E%202n%20%3D%206)
![= > n = \frac{6}{2} = 3](https://tex.z-dn.net/?f=%20%3D%20%20%3E%20n%20%3D%20%20%5Cfrac%7B6%7D%7B2%7D%20%20%3D%203)
Answer:
images not loading so can you please repost it
Step-by-step explanation:
I would first solve how long it takes for 1 tyres to make life easier. Just solve 56 divided by 4, which means that Liam takes 14 minutes to put one tyres into the van. For part a, I don't quite understand the 3 vans part, but you know he 's putting 12 tyres into a van, so multiply 12 by 14 to get 156. Part B gives you time instead of tyres. Solve it practically the same... 42 divided 14 is 3, so he fits 3 tyres in 42 minutes,
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