Answer:
(5,-1)
x=5
y= -1
Step-by-step explanation:
To solve this we're going to solve for one variable in either equation
so we have
x+y=4
We can subtract y and 4 from both sides to get
x-4= -y
Then divide by -1 so that y will be a positive number
-x+4=y
We can plug this in for y in the other equation
2x -2(-x+4)=12
Distribute the -2 and get
2x+2x-8=12
Combine like terms and add 8 to get
4x=20
divide and get x=5
Plug in x=5 into the first equation to get
5+y=4
subtract 5 to get y= -1
Our answer is (5,-1) or x=5 y= -1
I checked this on desmos and the math is correct
The answer is 20 trillion brainliest please
Step-by-step explanation:
all answers and steps are in picture
What we know:
Total of 140 animals
Rabbits are 5 less than one-half of cats
20 more cats than dogs
Work:
We know that there are 20 more cats than dogs. So we subtract that from 140, making it 120.
- Why: If we subtract 20 from 140, 120, cats and dogs have the same number.
c = cats
The equation is: 140 = (1/2c - 5) + (c - 20) + c
I don't know how to solve it, but this is my way:
Cats: 70 66
Dogs: 40 46
Rabbits: 30 28
I tried sort of guessing. I got near the first time, so I tried reducing it. Second time, it was the answer!
There are 28 rabbits, 66 cat, and 46 dogs.
I'm sorry for not being able to use real work, but I hope this helps a little.
The complement of A would be the elements in U that are not in A.
A is 2, 4, 6, 8
Remove those numbers from U for the complement.
The complement would be {1, 3, 5, 7, 9, 10}
