Tengo que poner una exprecion algrebraica relacionando la cantidad de plegados con la cantidad de rectangulos pequeños que se forman osea de cada uno de los rectangulitos no uniendolos para fomar mas :v entienden? PORFA AYUDA

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?

Can someone factor this fully? my friend and i have two different answers and i would like to know if either of them is right. you in advance. a^2 - b^2 + 25 + 10a

Jayne is studying urban planning and finds that her town is decreasing in population by 3% each year. the population of her town is changing by a constant rate.true or false?