The commutative property only works under addition and multiplication properties.
Answer:
The difference is 
Step-by-step explanation:
We must find the common denominator of the fractions.
The common denominator of 
and 
is 
; therefore we have
now it is easy to subtract 
using the number line: we have to move units to the left in order to get to 
.
Thus our answer is
The answer is -1/4
Perpendicular means opposite slope in this type of question
The sum of all the even integers between 99 and 301 is 20200
To find the sum of even integers between 99 and 301, we will use the arithmetic progressions(AP). The even numbers can be considered as an AP with common difference 2.
In this case, the first even integer will be 100 and the last even integer will be 300.
nth term of the AP = first term + (n-1) x common difference
⇒ 300 = 100 + (n-1) x 2
Therefore, n = (200 + 2 )/2 = 101
That is, there are 101 even integers between 99 and 301.
Sum of the 'n' terms in an AP = n/2 ( first term + last term)
= 101/2 (300+100)
= 20200
Thus sum of all the even integers between 99 and 301 = 20200
Learn more about arithmetic progressions at brainly.com/question/24592110
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