Jack had $80 more than eric. when jack spent $30, he found that the amount of money he had left was twice s much as eric had. how much did the boys have altogether at the beginning?

A) if $50000 is invested in a bank account that pays 9.3% of interest compounded on a six-monthly basis, how much money will be in the account after 3 and 12 years? b) if matusalen's father had put $2.0 in the bank when he was born and there, how long would matusalen have had to his death (969 years later) if the interest was 7% per year composed each month and weekly?

Asystem of equations has 1 solution. if 4x-y=5 is one of the equations , which could be the other equation ?

Zach spent 2/3 hour reading on friday a 11/3 hlurs reading on saturday. how much more time did he read on saturday tha on friday