Answer:
-0.48, 8/25, 0.45
Step-by-step explanation:
(plz brainliest if u can)
Answer:
2.4
Step-by-step explanation:
Okay so first what you would do is find the common difference we can find this by doing 5/3 which is 1.66666666667 (rounded to 1.7)
Then what we do is 4 divided by 1.66666666667 which is 2.4
Step-by-step explanation:
![{x}^{2} - 14x - 25 {y}^{2} + 100y = 76](https://tex.z-dn.net/?f=%20%7Bx%7D%5E%7B2%7D%20%20-%2014x%20%20-%2025%20%7By%7D%5E%7B2%7D%20%20%2B%20100y%20%3D%2076)
Factor by grouping,
![( {x}^{2} - 14x) - (25 {y}^{2} - 100y) = 76](https://tex.z-dn.net/?f=%28%20%7Bx%7D%5E%7B2%7D%20%20-%2014x%29%20%20%20-%20%2825%20%7By%7D%5E%7B2%7D%20%20-%20100y%29%20%3D%2076)
Complete the square, with the x variables,
![( {x}^{2} - 14x + 49) - (25 {y}^{2} - 100y) = 125](https://tex.z-dn.net/?f=%28%20%7Bx%7D%5E%7B2%7D%20%20-%2014x%20%2B%2049%29%20%20-%20%2825%20%7By%7D%5E%7B2%7D%20%20-%20100y%29%20%3D%20125)
Factor out 25 for the y variables
![( {x}^{2} - 14x + 49) - 25( {y}^{2} - 4y) = 125](https://tex.z-dn.net/?f=%28%20%7Bx%7D%5E%7B2%7D%20%20-%2014x%20%2B%2049%29%20-%2025%28%20%7By%7D%5E%7B2%7D%20%20-%204y%29%20%3D%20125)
Complete the square
![( {x}^{2} - 14x + 49) - 25( {y}^{2} - 4y + 4) = 25](https://tex.z-dn.net/?f=%28%20%7Bx%7D%5E%7B2%7D%20%20-%2014x%20%2B%2049%29%20-%2025%28%20%7By%7D%5E%7B2%7D%20%20-%204y%20%2B%204%29%20%3D%2025)
Simplify the perfect square trinomial
![(x - 7) {}^{2} - 25(y - 2) {}^{2} = 25](https://tex.z-dn.net/?f=%28x%20-%207%29%20%7B%7D%5E%7B2%7D%20%20-%2025%28y%20-%202%29%20%7B%7D%5E%7B2%7D%20%20%3D%2025)
Make the right side be 1 so divide everything by 25.
![\frac{(x - 7) {}^{2} }{25} - (y - 2) {}^{2} = 1](https://tex.z-dn.net/?f=%20%5Cfrac%7B%28x%20-%207%29%20%7B%7D%5E%7B2%7D%20%7D%7B25%7D%20%20-%20%20%28y%20-%202%29%20%7B%7D%5E%7B2%7D%20%20%3D%201)
Here our center is (7,2).
Step-by-step explanation:
1 hour 50 minutes = 110 mins
1 1/2 hours = 90 mins
add all these:
110
90
85
55
35
when you add all these you get 375
every hour has 60 minutes
375 ÷ 60 = 6.15
if he starts at 9 am and he cleans for 6.15 hours he will be finished by 3:15pm.