Help plz! I don't understand this problem!

Use the graph to fill in the table.

Which expression is equivalent to 2x^2+2x-4/2x^2-4x+2

1. what is the measure of ∠abc? what is the measure of ∠abd?

International calls require the use of a country code. many country codes a 3-digit numbers. country codes do not begin with a 0 or 1. there are no restrictions on the second and third digits. how many different 3-digit country codes are possible?