Find last years salary if, after 6 percent raise, this years salary is $33,920

Find the value of x for which the lines are parallel.

What is the absolute value of the complex number -4-sqrt2i

At the beginning of 1974/75,2 years a man invested #2000 in a bank at 12.5% compound interest, if it degree #650 at the end of each two years to pay his son's school fees, after payment of interest to pay his son's school fees, how much did he have left at the beginning of the 1978/79 school year?