22 19. A school has 37 vacancies for teachers,
out of which 22 are for English
Language, 20 for History and 17 for
Fine Art. Of these vacancies 11 are for
both English Language and History, 8
for both History and Fine Art and 7 for
English Language and Fine Art. Using
a Venn diagram, find the number of
teachers who must be able to teach:
(a) all the three subjects;
(b) fine art only
(c) English language and history but not fine art

Compare these two waves: the blue and orange waves have the same pitch, but the blue wave is louder. the blue and orange waves have the same volume, but the blue wave has a higher pitch. the orange wave has a higher pitch, but the blue wave is louder. the blue wave has a higher pitch, but the orange wave is louder.

Find the roots of the equation below. x^2 - 6 + 9 = 0

On traditional maps, earth is represented in a flat plane, or by euclidean geometry. however, a globe is a more accurate model that comes from elliptical geometry.how does a globe represent the fact that there are no parallel lines in elliptical geometry? the equator is not parallel to any other latitudinal lines. the north and south poles are never connected by a geodesic. the geodesics connecting the north and south poles never intersect. the geodesics connecting the north and south poles intersect at both of the poles.