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anonymous
 one year ago
let v=(2,8) and w=(1,4). which of the following is true
A. v=2w
B. The xcomponent of v is 2
C.V*W=32
D. V and W are perpendicular
anonymous
 one year ago
let v=(2,8) and w=(1,4). which of the following is true A. v=2w B. The xcomponent of v is 2 C.V*W=32 D. V and W are perpendicular

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0let's check one by one: A. v = 2w 2w = 2(1,4) = (2*(1),2*(4)) = (2, 8)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0and b is? how would you do that?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0V = (2, 8) is a vector with xcomponet 2 and ycomponent 8

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0v*w = (2,8)*(1,4) = 2*(1) + 8*(4) = 2  32 = 34

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0B is true, since v's xcomponet is 2

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0c is false, v*w = 34 and not 32

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0as v*w is not equal to zero, v and w are not perpendicular

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0So only A and B are true, thanks

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I have one more question?:)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0evaluate the following expression: 1(5,1)+2(1,1)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0what you have done so far?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0multiply the two out side numbers?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0show your work, then I see where you are getting wrong (if so)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0that's correct, now just sum component by component
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