20)brian brought 166.66
21)range(highest-lowest)=200-50=150
23)not sure
25)not sure
26)23-3=20
You have to substitute the expression with known values.
Here is the first one: 3(4)+2
Answer is 14
Second: 3(6)+ 3
Equals 21
And the last one: 3(8)+ 4
Answer is 28
Answer:
they have different areas and different perimeters
Lines b and c
they both go up 2 and over 1 (rise over run is slope)
I think it would be 6/x^2