Answer:
30
Step-by-step explanation:
third side is the hypotenuse since it is opposite to 90 degree.
using pythagoras theorem
a^2 + b^2 = c^2
24^2 + 18^2 = c^2
576 + 324 = c^2
900 = c^2
= c
30 = c
therefore third side is 30.
Equation: 
Since there aren't any like terms and it can't be factored, your answer would be:

Hope this answer helped you!
Answer:
A
Step-by-step explanation:
Compare to vertex form of parabola y=a(x-h)²+k
Vertex:-
As a is negative vertex is maximum
Max temperature=9°C
Fourth line in 3rd section