Answer:
12 gallons of 20% salt solution
Step-by-step explanation:
Let
x -----> the number of gallons of 20% salt solution
we know that
20%=20/100=0.20
40%=40/100=0.40
25%=25/100=0.25
so
0.20(x)+0.40(4)=0.25(x+4)
Solve for x
0.20x+1.60=0.25x+1
0.25x-0.20x=1.60-1
0.05x=0.60
x=12 gallons
Answer:
y = 4
Step-by-step explanation:
Step-by-step explanation:
Let x be the first integer
Let y be the 2nd integer
Let z be the 3rd integer
Given
Also given, x = 7, y = 8, z = 9, substitute x,y and z into equation.
Therefore,
x+y+z = 3y for x = 7, y = 8, z = 9.
Now lets take x = 3, y = 4, z = 5.
As you can see , x+y+z = 3y is true for any 3 consecutive numbers.
Answer:
the y-intercept is (-6, 0). The slope is (2, -2)
Step-by-step explanation:
Hope this helps:)