I will take 4 hours for it to be be 12 inches above its flood stage
Answer:
![x=3](https://tex.z-dn.net/?f=x%3D3)
![y=-4](https://tex.z-dn.net/?f=y%3D-4)
Step-by-step explanation:
----------- (1)
-----------(2)
Adding equation (1) and (2)
![4x+5y-4x-4y=-8+4](https://tex.z-dn.net/?f=4x%2B5y-4x-4y%3D-8%2B4)
![y=-4](https://tex.z-dn.net/?f=y%3D-4)
Substitute y=-4 in equation (1) or (2)
![4x+5(-4)=-8](https://tex.z-dn.net/?f=4x%2B5%28-4%29%3D-8)
![4x-20=-8\\4x=-8+20\\4x=12\\x=3](https://tex.z-dn.net/?f=4x-20%3D-8%5C%5C4x%3D-8%2B20%5C%5C4x%3D12%5C%5Cx%3D3)
Answer:
Roberta will jog 13 laps on the sixth day.
Step-by-step explanation:
In the pattern 3, 5, 7 we can see it is adding 2 each day.
Keep adding 2 until you get to 13, which is the sixth day.
Answer:
the value of x and y is 3 and -1 respectively.
Step-by-step explanation:
from the question
let
2x + 3y = 3........................ equation 1
y = 8 - 3x.............................. equation 2
put y = 8 - 3x in equation 1
2x + 3y = 3........................ equation 1
2x + 3 ( 8 - 3x) = 3
2x + 24 - 9x = 3
24 - 7x = 3
24 = 3 + 7x
24 -3 = 7x
21 = 7x
divide both sides by 7
x = 3
put x = 3 in equation 2
y = 8 - 3x.............................. equation 2
y = 8 - 3 ( 3)
y = 8 -9
y = -1
therefore the value of x and y is 3 and -1 respectively.