Find the first, fourth, and eight terms of the sequence: a(n)=-5•3n-1

Twelve less than a number is at most 20

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.

Plz answer asap! i will reward brainliest and 12 points for these three questions!take notice: these three questions are completely different! 1) what is the percentage of sugar in the syrup made of 10 kg of water and 4 kg of suugar? 2) what was the original price if after 10% discount it became $450? 3) at first a price was decreased by 12%, then it was disounted again by an additional 5%. what is the percent of the total discount? , and remeber i will award brainliest and 12 points!