Here the answer is http://prntscr.com/amkn6t thank you
Answer:
Design of Experiments Basics
Design of experiments (DOE) is a systematic method to determine the relationship between factors affecting a process and the output of that process. In other words, it is used to find cause-and-effect relationships. ... An understanding of DOE first requires knowledge of some statistical tools and experimentation concepts.
Combine like terms
5) = 4
8) = -5a -12
11) = 4b - 6
hope it helps
Last one
hhhhhhhhhhbbbbbbbbbb
10) 30
11) 4, 6
it's the same on both sides so you match the other side for 10...
for 11 you have to reduce one and 60/100 is the same at 6/10
