livvy

When did australia become a nation?? please i really need it!! my assignment is due tomorrow!!!

the 20th sum of an arithmetic progression is -7 and the sum of the first 20 terms is 620. find the 1st and 30th terms i am looking at using S20 = a(1-rn)/l-r = 620. but i am reallys tuck and think i am very wrong. please help.

The temperature at 6:00 am was -12 degrees. By 3:00 pm, the temperature was 27 degrees. What was the change in temperature between 6:00 am and 3:00 pm?

What really is the Wool Pooh that the children are warned about?