Question

HELP PLEASE!!!


Consider the two vectors A = 3 i − 3 j and B = −i − 6 j .

(a) Calculate A + B

(b) Calculate A − B

(c) Calculate | A + B|

(d) Calculate | A - B|

(e) Calculate the directions of A + B and A − B.
A + B = ° (counterclockwise from the +x axis)
A− B = ° (counterclockwise from the +x axis)

Answer 1

A = 3 i − 3 j and B = −i − 6 j
A+B = ( 3i -3j ) +( -i-6j )
=3i-i -3j-6j
do the last step

Answer 2

i got -6 for B and that was wrong

Answer 3

A+B = 2i -9j is the answer

Answer 4

now
A-B = ( 3i -3j ) - ( -i-6j )
= 3i +i -3j+6j

Answer 5

for A-B i got 6 - 3

the 3 was right and 6 was wrong

Answer 6

yes its not 6 its -9

Answer 7

that was wrong

Answer 8

so i told you the answer take that

Answer 9

thats not for A - B. so stp being rude

Answer 10

i prefer a vertical setup

A: 3 i - 3 j
B: - i - 6 j

adding it is simple enough, just work the columns as is

A: 3 i - 3 j
B: - i - 6 j
-----------
2i - 9j

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subtraction is just a matter of altering it as needed and working the columns;

A = 3 i - 3 j
-B = i + 6 j
-------------
4i + 3j

Answer 11

c and d are asking for the length of the vectors from the first questions