1. Which explicit formula represents an arithmetic sequence with a first term of 19 and a common difference of 4?

Option (2)

Step-by-step explanation:

If the first term of an arithmetic sequence is 'a' and common difference as 'd',

Explicit formula representing the nth term of the sequence is given by,

Here, n = number of term

If first term 'a' = 19 and common difference 'd' = 4

Explicit formula for the sequence will be,

Therefore, Option (2) will be the correct option.

b

step-by-step explanation:

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)