Plz answer. I need the information now

Step-by-step explanation:

it is angle 10 and angle 11 this is because supplementary angles add up to 180°

Angles 10 and 11

Step-by-step explanation:

For angles to be supplementary, they must add up to 180 degrees and be next to each other. By looking at the figure, we can see the only pair of angles that fit these criteria are angles 10 and 11.

b

step-by-step explanation:

the word superfluous means unnecessary

answer:

it is general formula that is used to write value to its excet position

a11 a12 a13

a21 a22 a23

it is the example of order 2 by 3 matrix in this

a11 means value occur in 1 st row 1st column

a12 means value occurs in 1st row 2nd column

a13 means value occur in 1st row and 3rd column

a21 means value occurs in 2nd row and 1st column

a22 means value occurs in 2nd row and in 2nd column

a23 means value occurs in 2nd row and in 3rd column