Solve each system by graphing 2x+y=4 / -3x+9y=-6

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?

Iwant to know what 3g+5h+4g-2h is my teacher is too selfish to tell us

Complete the solution of the equation. find the value of y when x equals to 6 4x+y=20