Given:
The equation is:

To find:
The next step in simplifying the equation by using distributive property.
Solution:
Distributive property: According to this property if a, b and c are three real numbers, then

We have,

Using the distributive property, we get

It can be written as:

Therefore, the next step of the simplification is
.
Answer:
0
Step-by-step explanation:
subtract 20 from 40 it's Zero
Answer:
Runners that decrease times are not improving
Step-by-step explanation:
Answer: The simplified form by combining like terms is given by

Step-by-step explanation:
Since we have given that

Now, we combine the like terms :
1) First we collect m terms :

2) Combine n terms and constant terms :

Hence, the simplified form by combining like terms is given by

I'm for sure know that it is function is linear but i would wait for others to answer also