Possible committees 10 C 3 = 10!/(3!7!) = .....
With Mark already on the committee you have one position filled and need to
choose two more people from 9 9 C 2 = 9! /(2! 7!) = ......
y = -16t2 + 18t +3
From a corner to the center of the opposite side is 8 for x 8 for y and 4 for z
sqrt (8^2 + 8^2 + 4^2 ) = sqrt 144 = 12 cm
sides curved roof
Total area to be covered 2 x 2.4x 8 + 1/2 pi *3.6 *8 = 38.4 + 45.23 = 83.64 m2
Each roll is 20 x 1.8 =36 m2
Rolls needed 83.64/36 =2.32 rolls ~~3 rolls
Total area of the circle pi r^2 = 25 pi
This fraction of the circle is 5 pi/12 / 2pi = 5/24 (I assume that was 5pi / 12 )
5/24 X 25 pi = .........
Just do it the same way I just did your first question......if you understand THAT answer , you can do this one with diferent numbers ......
**** deleted ***** misread
12 ( 6y + 9z)
or
36 (2y+3z)
Vertex (h,k) = (0,2)
vertex form y = a(x-h)^2 + k
y = a (x-0)^2 + 2
\sub in the point given to calc 'a'
6 = a4^2 + 2
4 = 16a a = 1/4
y = 1/4x2 + 2
(1 /4 - 1/5 )x = 3 liters solve for x