The amount of money, a, accrued at the end of n years when a certain amount, p , is invested at a compound annual rate, r, is given by the equation a =p(1+r)n. when joseph invests $500 in an account that pays 9% interest compounded annually, what is joe's approximate balance after 7 years? question 9 options: a) $258.38 b) $3815.00 c) $914.02 d) $932.54

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.

Ann and betty together have $60 ann has $9 more than twice betty’s amount how much money dose each have

Solve for x and y: 217x + 131y = 913; 131x + 217y = 827