How to write 0.125 as a fraction in simplest form

Which best explains why this triangle is or is not a right triangle?

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.

If 3x+8=3x+8 is it one solution or no solution