Can someone teach me how to do this? Please and thank you

For the first one, put the input(0) in the place of x. This would make it look like this, 3x0+5

The x is a times sign, which was added when you add the number.

The rest goes like this,

3x0=0

0+5=5

Ouput= 5

δabc ≅ δdcb by sas because

db ≅ ac . . given (side)

bc ≅ bc . . reflexive property (side)

∠dbc ≅ ∠ acb . . alternate interior angles where transversal bc crosses parallel lines bd and ac (included angle)