Equation for line y-intercept -5 and slope 2

Write the sentence as an equation. 6 fewer than the quantity 140 times j equals 104

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?

The pyramid below was dissected by a horizontal plane which shape describes the pyramid horizontal cross section