Answer:
x= 2
Step-by-step explanation:
hello :
y= -5x²+20x a= -5 b= 20
the axis symmetry is the line when an equation is : x = -b/2a
x= -(20)/2(-5)
x= 2
There is 2 formulas u will end up the same answer
Formula 1:

formula 2:
ab reperesent the 2 legs u cannot use the hyp
You can use any but i'll use the first one
==> 
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==> 832.5 is the answer
Answer:
96 ft
Step-by-step explanation:
Perimeter= a (base)+b (side)+c (side)
281 = 89 +b + c
281 -89 = b + c
192 = b+ c ( however in an iscoceles triangle, 2 sides aree equal therefore b and c will be equal)
So: 192/2 = 96
X-5=40 x=45 can I get the crown?
The answer is either 20 or 12