A stack of boards is 21 inches high. Each board is 13/4 inches thick. How many boards are there

What is the 17th term in the arithmetic sequence in which a6 is 101 and a9 is 83

What is the answer to the question 5x+2x

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!