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MrMathmatician Group TitleBest ResponseYou've already chosen the best response.0
The awnser is Deh
 2 years ago

phi Group TitleBest ResponseYou've already chosen the best response.1
dw:1339443442759:dw use pythagorean theorem to find the hypotenuse (length of the vector)
 2 years ago

agillogly Group TitleBest ResponseYou've already chosen the best response.0
like a^2+b^2=c^2? that would be 27.
 2 years ago

phi Group TitleBest ResponseYou've already chosen the best response.1
(3)^2 + 6^2 = c^2 c^2= 9+36 = 45 can you find c?
 2 years ago

phi Group TitleBest ResponseYou've already chosen the best response.1
sqrt(45) which you can simplify by noticing sqrt(45)= sqrt(5*9)
 2 years ago

phi Group TitleBest ResponseYou've already chosen the best response.1
But you want to use the same form that the answers are in. sqrt(45)= sqrt(5*9) can you simplify this?
 2 years ago

phi Group TitleBest ResponseYou've already chosen the best response.1
It is handy to know sqrt(a*b)= sqrt(a) * sqrt(b)
 2 years ago

agillogly Group TitleBest ResponseYou've already chosen the best response.0
[3\sqrt{5}\]
 2 years ago

phi Group TitleBest ResponseYou've already chosen the best response.1
btw, notice that the length of the vector has to be bigger than 6 (its x component). (Lengths will always be positive). So you could eliminate choices B and D immediately.
 2 years ago
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