Answer:
is that middle school or what
If we multiply the top equation by -4 we can get rid of the x so:
-4x+20y=-12
4x-4y=12
Add these up
16y=0
Y=0
X=3
Answer:
Elimination method
Step-by-step explanation:
We have a choice to eliminate the y or x:
I chose x
So now we double the second equation to make the co efficient of x the same:
6x-5y = -3
6x+4y = 24
Now we subtract both equations to eliminate the x's:
6x-5y = -3
- - -
6x+4y = 24
-9y = -27
y = 3
Now we substitute this value into either equation 1 or 2:
I chose 2
3x + 2(3) =12
Simplify:
3x + 6 =12
Subtract 6 from both sides:
3x + 6 -6 = 12 -6
Simplify:
3x = 6
Divide both sides by 3:
3x÷3 = 6÷3
Simplify:
x = 2
Answer:
For every x feet of rope purchased, the total cost(y) increases by $6.85.
Step-by-step explanation:
x is a placeholder for a number. Think of it as a box. Inside the box, we're told that 2 is there.
So we'll replace every x with 2 and use PEMDAS
5*x - 3*x = 5*2 - 3*2 = 10 - 6 = 4
After simplifying, the answer is 4.
