8 boat rides bill went on
Linear because you are adding the same amount every time
Answer:
A book about a mass of 1 kilogram, but that isn't the only answer.
Explanation:
There's many objects with a mass of one kilogram like one liter of water, a pineapple, bag of sugar etc.
You can group first two conjunctions and second two:

.
In first brackets you have common

and in second brackets common is 5:

.
Answer:
-21
Step-by-step explanation:
I assume this is a 2 by 2 matrix.

determinant = -5 * 4 - 1 * 1 = -20 - 1 = -21