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anonymous
 one year ago
If v1 = (2,4) and v2 = (1,5), then v1 * v2 is equal to which of the following?
A. 22
B. 18
C. (8,5)
D. (2,20)
anonymous
 one year ago
If v1 = (2,4) and v2 = (1,5), then v1 * v2 is equal to which of the following? A. 22 B. 18 C. (8,5) D. (2,20)

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0I am confused on whether or not I put my answer in parentheses or not. So it would be either B or D.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Would we leave them in the parentese or add the vectors together?

TheSmartOne
 one year ago
Best ResponseYou've already chosen the best response.2Cross product of verctors, right?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0It doesn't specify but that's what I am assuming.

TheSmartOne
 one year ago
Best ResponseYou've already chosen the best response.2Have they given you a figure or something?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Nope, just coordinates.

dan815
 one year ago
Best ResponseYou've already chosen the best response.2pretty sure then want dot product because none of those is cross

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Here's what I found. I think the answer would be 18... There is yet another operation associated with vectors. Given two vectors v1 = (x1,y1) and v2 = (x2,y2), the dot product of v1 and v2, written , is the scalar: x1x2 + y1y2. In other words, the dot product is obtained by multiplying corresponding coordinates of the two vectors and then adding the results.

dan815
 one year ago
Best ResponseYou've already chosen the best response.2for future ref, the cross product of 2 vectors will result in a vector that ins the direction that is perpendicular to both of the vectors in this case, the 2 vectors are in a plane <X,y> so the cross will exist completely in the Z direction <0,0,Z>
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