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Are the set of positive fractions closed under division?
Yes, because for any x and y that are positive fractions (y not equal to zero), x/y is also a positive fraction. Note that whole numbers are considered fractions with denominators of 1 -- otherwise it doesn't work.
How can you use substitution method to solve a system of equations that does not have a variable with a coefficient of 1 or -1?
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Why is it important to change mixed number to improper fraction?
When you are multiplying with mixed number fractions, it becomes easier to work with improper fractions instead. For example, 2 1/3 x 1 1/2 (two and a third times one and a half) is 2 x 1 + 2 x 1/2 + 1/3 x 1 + 1/3 x 1/2 But with improper fractions, it's 7/3 x 3/2 = 7/2 = 3 1/2
How do scientist solve problem in scientific way?
Using the scientific method, scientists can work together to test different hypotheses and determine the best solution for the problem
What are the pros and cons to using the substitution method to solve equations in algebra?
pros; you will learn to be smarter. cons; you will waste ALL your time, get angry, and punch your teacher for making you do the work.
