Answer:
100
Step-by-step explanation:
Given : 
To Find : the value of expression 5a.
Solution :
We are given the value of 'a' i.e. a=20
Now to find the value of given expression 5a
⇒
put a = 20 in the equation
⇒
⇒
⇒
Thus , The value of expression 5a when a = 20 is 100
Answer:
Step-by-step explanation:
What’s that tho?
21. the values of x such f(x) < g(x):

22. The values of x such g(x) < 0:
Answer:
8xy+4y-z
Step-by-step explanation:
Add values with the same variables; in this case xy
B. 94 because it is the same as the other one