What expression is 9c - 3 when c 10?

What is the mathematical equation you generally use to find the circumference of a circle when you know the diameter? How many seconds are there in 100 years? What percent of 101 is 13? How many lakhs make 5 billion? Polynomial x2 plus 9x plus 8 Enter each factor as a polynomial in descending order? Does an octagon have right angles? What is a dectigon? What does four hundred six thousandths look like in numeric form? What is -8ab? What is the lowest common multiple of 105 and 180? What is the lowest 2 digit prime? California has more national parks than many other states the sum of the two digits in its number of parks is 6 both digits are even if California has fewer than 30 parks how many does it have? What does 21 go into? Is 1988 a prime number? What divied makes 6? What are 5 multiples less than 100 that are common to 3 and 6 and 9? What is 60 percent as a simplified fraction? What is a date? What is an example of using the word finite? How do you convert utm cordinates to local cordinates?