Answer:
An acute angle is an angle less than 90°
Answer:
Here,

substituting the value of 4y in eqn i fron eqn ii
so eqn i becomes

So

Thus,

...hope this helps:)
A regular polygon of "n" sides has "n" Lines of Symmetry
so a regular 32 sided polygon has 32 lines of symmetry
Assuming that their exam success is independent then
P(both fail) = 1/4 x 2/5 = 2/20 or 1/10