How can you write the expression with a rationalized denominator?
2+sqrt 5/ 2- sqrt 5

a. -1
b. 1
c. 9+4 sqrt 5
d. -9-4 sqrt 5

I think that the square roots would cancel each other out and the 2/2 would come out to 1 making the answer B. but I'm not sure... Can someone help me figure it out and explain why it is that answer if I'm wrong?

i can you with this question sweetie!

step-by-step explanation:

the answer is $42.96

step-by-step explanation:

answer: 12   they all have at least 28 days

step-by-step explanation: haha

perimeter = 10 +  √10  units

explanation:

first, we will need to get the length of each line using the distance formula which is as follows:

distance = 

1- length of ab:

ab =   = 5 units

2- length of ac

length of ac is the same as ab = 5 units

3- length of bc:

bc =   =  √10  units

now, we can get the perimeter by adding the side lengths as follows:

perimeter = 5 + 5 +  √10

perimeter = 10 +  √10  units

hope this : )

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