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anonymous
 one year ago
THREE QUESTIONS HELP GIVING MEDALS
1.) Let u = <5, 6>, v = <2, 6>. Find 2u + 5v.
<20, 42>
<20, 0>
<0, 18>
<6, 0>
2.) Find the dot product, a · b.
a = 6i + 5j, b = 5i + 4j
50
<1, 9>
10
<30, 20>
3.) Determine whether the vectors u and v are parallel, orthogonal, or neither.
u = <7, 2>, v = <21, 6>
Neither
Orthogonal
Parallel
None of these
anonymous
 one year ago
THREE QUESTIONS HELP GIVING MEDALS 1.) Let u = <5, 6>, v = <2, 6>. Find 2u + 5v. <20, 42> <20, 0> <0, 18> <6, 0> 2.) Find the dot product, a · b. a = 6i + 5j, b = 5i + 4j 50 <1, 9> 10 <30, 20> 3.) Determine whether the vectors u and v are parallel, orthogonal, or neither. u = <7, 2>, v = <21, 6> Neither Orthogonal Parallel None of these

This Question is Closed

DanJS
 one year ago
Best ResponseYou've already chosen the best response.1You can add similar dimensions for vectors, and you can multiply a vector by a constant scalar....

DanJS
 one year ago
Best ResponseYou've already chosen the best response.1<a,b> + <c,d> = <a+c , b+d>

DanJS
 one year ago
Best ResponseYou've already chosen the best response.1those are the two rules for part 1

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0i literally hv no clue how to get an answer

DanJS
 one year ago
Best ResponseYou've already chosen the best response.1ok.. , here is the first step, replacing u and v with the vectors given 2u + 5v = 2*<5, 6> + 5*<2, 6>

DanJS
 one year ago
Best ResponseYou've already chosen the best response.1Now you can, by the first rule i gave, distribute the numbers into the vectors...

DanJS
 one year ago
Best ResponseYou've already chosen the best response.1havent looked at answers , not sure

DanJS
 one year ago
Best ResponseYou've already chosen the best response.12u + 5v = 2*<5, 6> + 5*<2, 6> = <10, 12> + < 10, 30>

DanJS
 one year ago
Best ResponseYou've already chosen the best response.1now use rule 2 that i gave

DanJS
 one year ago
Best ResponseYou've already chosen the best response.1<10, 12> + < 10, 30> = <10+(10) , 12 + (30) >

Loser66
 one year ago
Best ResponseYou've already chosen the best response.0@em2000 It is not hard, please learn how to solve it rather than rely on others. Follow @DanJS and you can do whatever you like. Please, don't just guess the answer. YOu CAN do it by yourself.:)

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0for #2 i got 50 and #3 i got neither, did u get those?

DanJS
 one year ago
Best ResponseYou've already chosen the best response.12dimensional dot product for part 2 a = <6 , 5> b = <5 , 4> a * b = 6*5 + 5*4 Dot product, just add the product of each dimension

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0awesome, is 3 wrong?

DanJS
 one year ago
Best ResponseYou've already chosen the best response.1For part 3, the notes to remember are, if for 2 vectors A and B A * B = 0 They are Orthogonal One is a scalar multiple of the other, they are parallel, B = k*A or A = k*B

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0so they def not orthogonal

DanJS
 one year ago
Best ResponseYou've already chosen the best response.1hint, the dot product is not zero, and try multiplying the first vector by 3

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ohhh theyre parallel!!

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0thank u so much you are great!!!

DanJS
 one year ago
Best ResponseYou've already chosen the best response.1no prob, numbers are meaningless, just remember the 3 or 4 rules... good luck
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