Anumber increased by 4 is the same as 19 minus 2 times the number

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.

Ineed to know the answer right now! !

What is the radius of a circle with an area of 78.5 cubic inches? use 3.14 for pie