9. An equation representing the height of a burning candle is H = 2(9-21), where H is the height of the candle in cm and
t is the amount of time that the candle has been burning in minutes,
How long will it take for the candle to burn down to a height of 4 cm?
a. 2 min
b. 3.5 min
c. 5.5 min
d. 7 min

Aline passes through the point (2, -4) and has a slope of 0, what is the equation of the line? plz fast

(least common multiples) the answer that i had in the 1st step was lcm of airline tickets sold=72. idk if that even matters but just in case. ! three co-workers are busy selling airline tickets over the phone. in an 8-hour day, charles can sell 8 airline tickets, ann can sell 9 airline tickets, and michelle can sell 6 airline tickets. step 2 of 2: what is the smallest number of 8-hour days needed for each of them to achieve the same number of sales? it takes charles . it takes . it takes .

Ricky takes out a $31,800 student loan to pay his expenses while he is in college. after graduation, he will begin making payments of $190.66 per month for the next 30 years to pay off the loan. how much more will ricky end up paying for the loan than the original value of $31,800? ricky will end up paying $ more than he borrowed to pay off the loan.