De cierto número de problemas, Roberto resuelve el primer dia 3/10 del total y en el segundo día resuelve 5/7 de lo que le faltaba resolver, lo que es igual a 50 problemas. ¿Cuántos problemas le faltan resolver?

Find the simple interest earned to the nearest cent for each principal,interest rate,and time 735 7% and two and a half years

Someone this asap for a group of students attends a basketball game. * the group buys x hot dogs at the concession stand for $2 each. * the group buys y drinks at the concession stand for $3 each. the group buys 29 items at the concession stand for a total of $70. how many hot dogs did the group buy?

Determine which expressions represent real numbers and which expressions represent complex number. asaaap! plis!