The answer to 8+11 is 19 because 8+1 is 9 so 11+8 is 19
The second one because for every x value there is one and only one y value. If you plotted the points and graphed it, you would know it is not a function if it doesn't pass the vertical line test. Notice the same x values show up repeatedly in the other ordered pairs with different y values. Only one y value for every x value
Do 4.98*7 5/8 and then you will have your answer its all in the question
I got 20.8 and in fraction form it would be 20 4/5