Answer:
1: proportion means 2 ratio are equivalent
2: its also known as constant of proportionality
Step-by-step explanation:
give me brainlist pls
5/6+1/4
20/24 + 6/24 = 26/24= 1 1/12 one whole and one over twelve
Answer:
3.0909 hours
Approximately ≈ 3.1 hours
Step-by-step explanation:
We are given the following values or variables in the question above
Train A moves at a speed of = 50mph( miles per hour)
Train B moves at a speed of = 60mph( miles per hour)
The original distance between them = 340 miles
We are asked to determine how soon they will meet, which means we are to determine the time(in hours) at which they would meet.
The formula to be used to calculate the time in hours =
Time(hours) = Distance(miles) ÷ Relative(Total) Speed (mph i.e miles per hour)
Distance = 340miles
Relative or Total Speed = Speed of Train A + Speed of Train B
Speed = 50mph + 60mph
Speed = 110mph(miles per hour)
Time (hours) = 340miles ÷ 110mph
Time in hour = 3.0909 hours
Approximately ≈ 3.1hours
Therefore Train A and Train B will meet in 3.1 hours.
Answer:
Multiply the first equation by 3
Multiply the second equation by -7
Step-by-step explanation:
After doing the above method, you will derive equation 3 and 4 then you can eliminate the x and get y .
FURTHER EXPLANATION
![-7x + 2y = 5 -------(1)\\3x - 5y = -5-------(2)\\\\-7x + 2y = 5 -------(1) \times 3\\3x - 5y = -5-------(2)\times-7\\\\-21x +6y=15 -----(3)\\-21x +35y=35----(4)\\Subtract -eq- 4- from -eq- 3 \\-29y =-20\\Divide-both-sides-by;-29\\\frac{-29y}{-29} =\frac{-20}{-29} \\y = 20/29\\](https://tex.z-dn.net/?f=-7x%20%2B%202y%20%3D%205%20-------%281%29%5C%5C3x%20-%205y%20%3D%20-5-------%282%29%5C%5C%5C%5C-7x%20%2B%202y%20%3D%205%20-------%281%29%20%5Ctimes%203%5C%5C3x%20-%205y%20%3D%20-5-------%282%29%5Ctimes-7%5C%5C%5C%5C-21x%20%2B6y%3D15%20-----%283%29%5C%5C-21x%20%2B35y%3D35----%284%29%5C%5CSubtract%20-eq-%204-%20from%20-eq-%203%20%5C%5C-29y%20%3D-20%5C%5CDivide-both-sides-by%3B-29%5C%5C%5Cfrac%7B-29y%7D%7B-29%7D%20%3D%5Cfrac%7B-20%7D%7B-29%7D%20%5C%5Cy%20%3D%2020%2F29%5C%5C)
![Substitute ; 20/29 for y- in- eq 1\\-7x + 2y = 5----(1)\\-7x +2(20/29) = 5\\-7x +40/29=5\\-7x = 5 - 40/29\\-7x = 105/29\\Divide through by -7\\x = -15/29](https://tex.z-dn.net/?f=Substitute%20%3B%2020%2F29%20for%20%20y-%20in-%20eq%201%5C%5C-7x%20%2B%202y%20%3D%205----%281%29%5C%5C-7x%20%2B2%2820%2F29%29%20%3D%205%5C%5C-7x%20%2B40%2F29%3D5%5C%5C-7x%20%3D%205%20-%2040%2F29%5C%5C-7x%20%3D%20105%2F29%5C%5CDivide%20through%20by%20-7%5C%5Cx%20%3D%20-15%2F29)
I Hope It helps