Question 65188
a^2+b^2=c^2 c being the hypotenuse
20^20=15*15=c^2
400+225=c^2
c^2=625
c=25
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2sqrt12/4sqrt27 factor sqrt 12=sqrt4*3 & sqrt 27=sqrt9*3 
2*2sqrt3/4*3sqrt3
4sqrt3/12sqrt3 factor out the 4 & the sqrt 3 leaves you with
1/3
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distance between (4,0)& (-9,0)is
4-(-9)=4+9=13 is the distance between thwese two points
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