9 because 18÷2=9
you can use models to help too
get 18 things and put them in 2 groups
Answer:

Step-by-step explanation:



<h3>Hope it is helpful...</h3>




Divide -20 by 5 to get -4.

Multiply -4 and -3 to get 12.

Multiply 4 and -2 to get -8.

Multiply -8 and -1 to get 8.

Add 12 and 8 to get 20.

Calculate 4 to the power of 2 and get 16.

Subtract 16 from 20 to get 4.

Answer:
To be called the order of the mayor of Minors nonzero in a matrix
D range of a matrix
Answer:
first to last second to middle and last to top