Answer:
x=-3 and x=-2
Step-by-step explanation:
I wrote the math down
What are you solving for? X?
Complete Question
The complete question is shown on the first and second uploaded image
Answer:
a

b

c

Step-by-step explanation:
Now looking at the diagram
Following the direction of the unit vectors

=> 
And
jjj
=> 
Also

=> 
Answer:
2/5 of the cake
Step-by-step explanation:
First, find how much she gave away:
2/5 + 1/5
= 3/5
Then, to find how much she has left, subtract 3/5 from 1
1 - 3/5
= 2/5
So, she has 2/5 of the cake left for herself