Which line is the line of reflection?

a
b
c
d

Marco has $38.43 dollars in his checking account. his checking account is linked to his amazon music account so he can buy music. the songs he purchases cost $1.29. part 1: write an expression to describe the amount of money in his checking account in relationship to the number of songs he purchases. part 2: describe what the variable represents in this situation.

Solve the triangle. a = 21°, c = 105°, c = 5

Need plz been trying to do it for a long time and still haven’t succeeded