Mathematics, 27.07.2019 08:30, glitterpanda2468

What is the closure property of subtraction for rational expressions? explain why rational expressions are closed under subtraction.

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I already answered this question by saying that the closure property of susbtraction for rational expression is the fact that the result of the substraction of rational expression is also a rational expression.

The closure property applies to many operations and to many sets. It means that the application of a particular operation on a particular set will result in an element of the same set.

In this case of substraction it means that when substraction is performed to the set any elements in the rational set the result will we also an element of the rational set.

So, rational expressions are closed under subtraction becasue always that you subract a rational from another rational (or even the same rational) the result is also a rational.

Here are some new examples which will help you:

1/2 - 1/4 = 1/4

100/3 - 50/3 = 50/3

2.276 - 1.325 = 0.951

That is if you subtract a rational from a rational the result is a rational (always). You can not escape from rational set by subtracting elements of the same set.

Again, always that you subtract a rational from other rational the result is a rational.

answered: Guest

step-by-step explanation:

i'm assuming you need to figure out how many campers go into each tent.

i got the answer by:

24+4=28

28/4=7

answered: Guest

the results from a pre-test for students for the year 2000 and the year 2010 are illustrated in the box plot. what do these results tell us about how students performed on the 29 question pre-test for the two years?

if we compare only the lowest and highest scores between the two years, we might conclude that the students in 2010 did better than the students in 2010. this conclusion seems to follow since the lowest score of 8 in 2010 is greater in value than the lowest score of 6 in 2000. also, the highest score of 28 in 2010 is greater in value than the highest score of 27 in 2000.

but the box portion of the illustration gives us more detailed information. the middle bar in each box shows us that the median score of 20 in 2000 is greater in value than the median score of 17 in 2010. further, we note that the box and whiskers divide the illustration into four pieces. each of these four pieces represents the same portion of students. so, the upper half of the students in 2000 scored in the same score range as the upper one-fourth of the students in 2010, see the illustration at a score of 20.

by considering the upper one-fourth, upper half, and upper three-fourths instead of just the lowest and highest scores, we would conclude that the students as a whole did much better in 2000 than in 2010. we would conclude that as a whole the students in 2010 are less prepared than the students in 2000.

in this section, we discuss box-and-whisker plots and the five key values used in constructing a box-and-whisker plot. the key values are called a five-number summary, which consists of the minimum, first quartile, median, third quartile, and maximum.

step-by-step explanation: