You found $5, so it's positive. You don't put anything in the negative, because you aren't losing anything.
Answer:
In mathematics, the dot product or scalar product is an algebraic operation that takes two equal-length sequences of numbers (usually coordinate vectors), and returns a single number. ... Algebraically, the dot product is the sum of the products of the corresponding entries of the two sequences of numbers
kamsahamnida have a great day
This is wrong.
It's supposed to be -4/15.
But try -4/5.
We need to find the other base also in order for us to find out what the area of this is.