The value in Canadian dollars of the money in Merl's bank account goes down because it takes .14 more Yuan to make 1 Canadian dollar.
First, you put the triangles in a ratio
Then, you ask yourself "what do I have to divide seven by to get 5" so you do 7.5/5 to get that answer (which is to divided by 1.5)
Then, on the other side, you divide 22.5 by 1.5 as well
Answer:
is this a question meant to evaluate you, such as a test, exam, quiz, or assessment?
Do you mean an extraneous solution? I will tell you what I think. To tell if a solution is extraneous you need to go back to the original problem and check if there actually is a solution or if the solution is actually right. If not then it is extraneous.
The answer is 4 square root 5 or -4 square root 5