Which expresion is equivalent to 8x -2y+x+x

Evaluate-27 ^4/3/8 a) - 81/16 b) 81/16 c) 16/81

If square root x = -7, then x= -49 true or false

If $740 is invested at an interest rate of 11% per year and is compounded continuously, how much will the investment be worth in 7 years? use the continuous compound interest formula a = pert.