(7/8) - (2/5)
= (7/8) · (5/5) - (2/5) · (8/8)
= (35/40) - (16/40)
= (19/40)
14. 5/6
15. 13 9/10
16. 5/12
17. 5/8
(those are the answers i got i'm sorry if some of them are not correct but i used a website called mathpapa and its an algebra calculator and works well)
and
are vectors and:
![\vec{u}=14j=0i+14j=[0,14]\\\\ \vec{v}=i+4j=1i+4j=[1,4]](https://tex.z-dn.net/?f=%5Cvec%7Bu%7D%3D14j%3D0i%2B14j%3D%5B0%2C14%5D%5C%5C%5C%5C%0A%5Cvec%7Bv%7D%3Di%2B4j%3D1i%2B4j%3D%5B1%2C4%5D)
is the dot product or scalar product, so:
![\vec{u}\cdot\vec{v}=[0,14]\cdot[1,4]=0\cdot1+14\cdot4=56](https://tex.z-dn.net/?f=%5Cvec%7Bu%7D%5Ccdot%5Cvec%7Bv%7D%3D%5B0%2C14%5D%5Ccdot%5B1%2C4%5D%3D0%5Ccdot1%2B14%5Ccdot4%3D56)
Correct answer is A.
Answer: 3/7
Step-by-step explanation:
I really think that’s it
