George has 16 coins in his pocket. He has both dimes and quarters. If he has $2.20 in his pocket, how many of each coin does he have? How would your equation change if you knew that George had three times as many times as he had quarters instead of knowing the total number of coins in his pocket? What is the new equation?
(The last half of it is what I’m struggling on. Any help would be appreciated, thanks)

What are the sotions to the quadratic equation 9x^2=4

The position of a moving particle is given by the position function: f(t)=-9t-t^2-0.2t^3+0.1t^4 a. at what time does the particle reverse direction? b. when is the displacement positive? (round one decimal place and answer in interval notation) c. when is the displacement negative? (round one decimal place and answer in interval notation) d. when is the particle’s acceleration positive? (round one decimal place and answer in interval notation) e. when is the particle’s acceleration negative? (round one decimal place and answer in interval notation)

Question 9 of 10 2 points suppose your sat score is 1770. you look up the average sat scores for students admitted to your preferred colleges and find the list of scores below. based on your sat score of 1770, which average score below represents the college that would be your best option? o a. 1790 o b. 2130 o c. 2210 od. 1350