Answer:
$6
Step-by-step explanation:
Divide 1.80 by 3, then multiply that answer by 10.
1.7/1.9 = 0.894 (rounded)
The answer is (0,-4),(1,0)
The value of 2^(-1) is 0.5
I don't know what the "six-step method" is, but I do know how to solve the problem:
Let x = number of gallons of 50% solution
amount of antifreeze in 50% solution = 0.50x
amount of antifreeze in 10% solution = 0.10(80) = 8
amount of 40% solution = 0.40(x+80) = 0.40x + 32
Then, 0.50x + 8 = 0.40x + 32
0.10x = 24
x = 240 gal