6578 i don’t know don’t ask me bit
Answer:
2,100 cubic feet
Step-by-step explanation:
20 × 15 × 8 = 2,400
20 × 15 × 1 = 300
2,400 - 300 = 2,100
Since one equation has a negative y and the other has a positive y, I'm going to use those since they cancel each other out. Before that, the two y's need to be equal to each other.
x+2y=6
x-y=3
Multiply the bottom equation by two so then you have:
x+2y=6
2x-2y=6
The y's now cancel out:
x=6
2x=6
Add them together
3x=12
Divide
x=4.
To find y, plug x into either equation (*don't have to do both, but I will)
(4)+2y=6
(4)-y=3
Subtract four
2y=2
-y=-1
Divide each
2y/2 = 2/2
y=1
-y/-1 = -1/-1
y=1
The answer is:
x=4
y=1
I hope that helps!
So, this is a proportion problem. If we express 75% as a fraction (3/4ths), we have:
![\frac{370+x}{500+x}=\frac{3}{4}](https://tex.z-dn.net/?f=%20%5Cfrac%7B370%2Bx%7D%7B500%2Bx%7D%3D%5Cfrac%7B3%7D%7B4%7D%20)
Since he won all of his games, we add the number won (x), to the number previously won and divide it by the total games played which is just the previous games played plus the number of current games played, so since he lost no games we still add x to the denominator as well. Solving this gives us:
![4(370+x)=3(500+x) \implies\\ 1480+4x=1500+3x \implies \\ x=20](https://tex.z-dn.net/?f=%204%28370%2Bx%29%3D3%28500%2Bx%29%20%5Cimplies%5C%5C%201480%2B4x%3D1500%2B3x%20%5Cimplies%20%5C%5C%20x%3D20%20)
That x value is 20.
Answer:
-0.5 is the answer I think