![4w-2(1-w)=-38\qquad|\text{use distributive property}\\\\4w+(-2)(1)+(-2)(-w)=-38\\\\4w-2+2w=-38\qquad|\text{add 2 to both sides}\\\\4w+2w=-36\\\\6w=-36\qquad|\text{divide both sides by 6}\\\\\boxed{w=-6}](https://tex.z-dn.net/?f=4w-2%281-w%29%3D-38%5Cqquad%7C%5Ctext%7Buse%20distributive%20property%7D%5C%5C%5C%5C4w%2B%28-2%29%281%29%2B%28-2%29%28-w%29%3D-38%5C%5C%5C%5C4w-2%2B2w%3D-38%5Cqquad%7C%5Ctext%7Badd%202%20to%20both%20sides%7D%5C%5C%5C%5C4w%2B2w%3D-36%5C%5C%5C%5C6w%3D-36%5Cqquad%7C%5Ctext%7Bdivide%20both%20sides%20by%206%7D%5C%5C%5C%5C%5Cboxed%7Bw%3D-6%7D)
<h3>Answer: d. w = -6</h3>
Capacity of the tank = 45 gallon
At the beginning of Oct., amount of oil in the tank = 45*0.8 = 36 gallons
At the end of Oct., amount of oil in the tank = 45*1/3 = 15 gallons
So, amount of oil used during Oct = (36-15) = 21 gallons
16 - 4 [ 3 + 2 / (9 - 7)]
16 - 4 [ 3 + 2 / 2)]
16 - 4 [ 3 + 1 ]
16 - 4 [4]
16 - 16
0 <===
Well, zero is between negative and positive numbers. Negative number are less than zero and positive numbers. Positive number are greater than negative number and zero. And, zero is greater than negative number but smaller than positive number.
Negative number < Zero < Positive number