PLS HELP ME ASAP ILL GIVER BRAINliest

Geometry paper. i don't know how to do the rest. questions 5. 8. 9. and 10.

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.

Find an equation of the line perpendicular to the graph of 28x-7y=9 that passes through the point at (4,1)