Question

7. The addition of - 7b and 2b is
8. Variables and constants are combination of
expression
9. The corner of the A4 sheet has angle.
10. A tetromino is a shape obtained by
squares together.​

Answer 1

Answer:

7= 5b and 8 th = linear equation , 9 right angled traingle , 10 yes

Answer 2

Answer:

7. -7b+2b = -5b

8. algebric

9. 90°

10. joining four squares orthogonally

*Orthogonally means at the edge , not at the corners