Answer:
![y - 2x - 1 = 0](https://tex.z-dn.net/?f=y%20-%202x%20-%201%20%3D%200)
Step-by-step explanation:
the slope is :
![\tan( \alpha ) = 4 \div 2 = 2](https://tex.z-dn.net/?f=%20%5Ctan%28%20%5Calpha%20%29%20%20%3D%204%20%20%5Cdiv%202%20%3D%202)
at a pt on graph , when
![x = 1 \\ y = 3 \\](https://tex.z-dn.net/?f=x%20%3D%201%20%5C%5C%20y%20%3D%203%20%5C%5C%20)
therefore, coordinates are (1,3)
The equation is :
![(y - 3) = slope \times (x - 1) \\ (y - 3) = 2 \times (x - 1) \\ y - 3 = 2x - 2 \\ y - 2x - 1 = 0](https://tex.z-dn.net/?f=%28y%20-%203%29%20%3D%20slope%20%5Ctimes%20%28x%20-%201%29%20%5C%5C%20%28y%20-%203%29%20%3D%202%20%5Ctimes%20%28x%20-%201%29%20%5C%5C%20%20y%20-%203%20%3D%202x%20-%202%20%5C%5C%20y%20-%202x%20-%201%20%3D%200)
Answer:
I need help man..I am in grade seven
The answer is the third option
Answer:
dddddddd
Step-by-step explanation:
Answer:
15
Step-by-step explanation:
Let x represent the number of hours it takes the larger hose to fill the pool. Then each hour, it contributes 1/x of the pool volume. Similarly, the other hose contributes a volume of 1/(1.5x) each hour.
The two hoses together contribute a volume of 1/9 of the pool volume each hour:
1/x +1/(1.5x) = 1/9
2.5/(1.5x) = 1/9 . . . . combine the fractions
22.5/1.5 = x . . . . . . multiply by 9x
15 = x
It takes the larger hose 15 hours to fill the pool alone.