What is the total number of rays in the figures to the right

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.

Average acceleration: i have no idea how to do this.

Find the midpoint m of z1=(8+5i) and z2=(12+3i)