Question

Could someone check these?

I'm finding the magnitude for 5 and 6.

5. v=3i+j

My magnitude is 3.16

6. v=2i+3j

My magnitude is 3.61

For 22 and 23 I'm finding each specified vector or scalar.

u=2i-5j, v=-3i+7j, w=-i-6j

22. v+w
answer: -4i+j

23. u-v
answer: 5i-13j

Answer 1

5. magnitude = √10 or appr 3.16 , ok
6. magnitude = √(4+9) = √13 or appr 3.61 , ok

22. ok

23. 5i - 12j , (5+7 used to 12 , not 13 !! )