What equation can be written for 29 is 6 more then k? what is K?

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.

Simplify the expression. -2/5(10+15m-20n)

What is r i 4.5+10r=-6.5 with work pls