Answer:why
Step-by-step explanation:
Graph is attached to this answer!
Answer:
13. no. the value changes when you solve for them
14. yes identity
15. yes commutative
16. yes commutative
I tend to flip so x is on the left, so:
-2x - 1 = 16
-2x = 17
x = -17/2, which is -8.5
Rounding up, your answer would be x = -8 !
Plug in a -20 wherever you see a b
(-20)^2 +4*-20-89/13
400 + -80-89/13
400 - 169/13
400-13
=387
Hope this helps
