I have to show my work if you help me show my work ill give brainliest

16

Step-by-step explanation:

      20.00

       -3.58

-----------------------

Ok so first part is 0-8 which won't work so you need to borrow from the one on the left. The left is also 0, so the second zero needs to borrow from the next number on the left. That one is once again another 0 which also needs to borrow. Finally we reach a 2, which becomes 1 because it gives the 0 on it's right 1. So the zero on it's right becomes 10, but the others still need to borrow. So the zero that's now a ten will give 1 to the one on IT'S right. So the zero that used to be 10 is now 9, and the zero next to it is 10. Finally the zero that is currently 10 gives to the one on the furthermost right, making the last zero a ten and the one that gave becomes a 9. Here's what it looks like now:

Check the file 1

So now you subtract normally, using the numbers that aren't crossed

I know this was long but hope you understood!

- "runner b is moving at a slower rate."

- "the graphs shown are graphs of distance(km) against time(min).

the slopes of this graphs are are given by:

slope = (change in y)/(change in x)

= (change in distance)/(change in time)

this is the formula for finding the speed. so, the slope of these graphs represent the speed of the runner.

taking each division in the graph to represent 1 on both axis:

runner a ⇒ speed = (2-0)/(1-0)

= 2/1

= 2 km/min

runner b ⇒ speed = (3-0)/(3-0)

= 3/3

= 1 km/min

this shows that   runner b is moving at a slower rate."