How many solutions does the system have? x y = 5 x y = 6 none one two infinite

The authors use the word “backbone” in lines 3 and 39 to indicate that

Which characteristic demonstrates a healthy self-esteem? accepts others does not listen well seeks constant approval frustrates easily

Need will give 100 ! in no less than one hundred fifty words, explain why it is important for engineers to sketch designs and use them to clarify their designs to other people, giving at least three reasons.