3−2(9+2m)=m im confused on what to do?

-15-4m-m

Step-by-step explanation:

There is a variable so you are going to be careful.

First you do the distributive property with the parenthesis.

Since there is a negative infront of the two, you multiply everything by that negative number

So -2 times -9 is 18 and -2 times 2m is -4m.

Now your problem should look like this.

3-18-4m=m

Now combine like terms

You should come up with:

-15-4m=m

Since you cannot add anything else you would leave it like that!

- "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."