The minus symbol is an arithmetic operator used to represent subtraction. The plus-minus symbol is used in math to represent both positive and negative results from a calculation. It also indicates the error or uncertainty in measurements.
Minus 1 plus 1 is 0. That's why I did that, to get a zero there. Minus 1 plus 2 is 1. 1 plus 1 is 2. 0 plus 1 is 1. 0 plus 0 is 0. And now, I also want to zero out this guy right here. Let's replace the third row with the third row minus 2 times the second row. 0 minus 2 times 0 is 0. 2 minus 2 times 1 is 0. 5 minus 2 times 2 is 5 minus 4, thatWhat Does The "T" In "T-minus" Stand For? In a NASA countdown to a rocket launch, "T-minus" means "time minus"; the "T" stands for the exact time at which the rocket is to be launched. Technically, the "T" in "T-minus" is an indicator of the main sequence countdown time, which serves as a synchronization device for
Income elasticity of demand (YED) measures the responsiveness of quantity demanded for a product to a change in income. Formula: YED = % change in quantity demanded / % change in income. For normal necessity products: YED is positive but coefficient < +1. For normal luxury products: YED is positive but coefficient > +1.
In any case, an easy way to remember what the circle and line mean is to think of it as a 1 and 0. Recall your computer science, logic, electrical engineering, whatever classes:FQ7bEUO.