What is the answer 3.5r=3(4+.5r)?

Which of the following expressions is equal to 2x^2+8

You can find the constant of proportionality by finding the ratio of

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.