The answers for the practice questions in this book do not match up to the questions asked. When back tracking I have worked out that minus signs have been randomly added or dropped very often. This makes it very unhelpful when revising as when checking an answer you have to consider the strong possibility that the answer in the book is wrong. This is unacceptable for a book of this price and would recommend buying another option.
The book has lots of example exercises with very good step-by-step explanations but this edition (unlike the previous ones) is marred with typos and the register of solutions at the end seems to have just been copied and pasted from the previous edition even though some of the questions were changed. This can be a real problem in that you will end up trying and trying to solve an exercise and in the end it will turn out that not your solution, but the one provided at the end of the book is wrong. I would recommend one of the older editions.
Ian Jacques in this 8th edition of Mathematics for Economics and Business has produced a useful work, most specifically for students who did not perform well in Mathematics in High School but still want to conduct studies in Economics and Business. Ian Jacques does not adopt the professorial tone of the majority of university lecturers but levels with these mathematics-challenged students by using the conversational level language and more so in his rectangular frame Advice placed at the bottom of the various Sections of the text. He starts with Linear equations (negative numbers,expressions,brackets) and right in this first chapter addresses the Supply and Demand analysis of Economics.. Ian Jacques' work gives a second chance to students who suffered through bad teaching of Mathematics in High School but still want a career or training in Economics and Business. Go for it !