
The appropriate choice is ...
C) -x^3 + x^2 - 1
Answer:
Is a quadrilateral with one pair of opposite sides parallel
Step-by-step explanation:
Let the number be a
6a - 20 = 3a + 4
Group like terms
6a - 3a = 20 + 4
3a = 24
divide through by 3
a = 8
Therefore the number is 8