Containers are stacked in 20 rows, putting 2 in the top row, 5 in the second row, 8 in the third row, and so on. How many containers are in the pile? help me ​

(if f(x)=4x^2 and g(x)=x+1, find (f o g)(x)

Labc is reflected across x = 1 and y = -3. what are the coordinates of the reflection image of a after both reflections?

Grading scale 1 has the following weights- (tests- 50% quiz- 25% homework- 15% final exam- 10%). calculate your final average if your performance in the class is as follows-test grades- {88, 84, 90, 75, 70, 81); quiz grades- {88, 67, 90, 90, 45, 99, 76, 98, 100}; homework- 90; final exam- 75