S and T are two-digit positive integers that have the same digits but in reverse order. If the positive difference between S and T is less than 40, what is the greatest possible value of S minus T

Which expression is equivalent to (3^2)^-2 a.-81 b.-12 c.1/81 d.1/12

Factor completely. 4p^2 + 36p + 81 express the answer in the form (ap + b)^2

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.