Vertex form: y = a(x - h)² + k
h = 2
k = -1
y = 0
x = 5
0 = a(5 - 2)² - 1
0 = 9a - 1
a = 1/9
Well the answer i got was

when i multiplied
the answer i got when i added was
Answer:
1
Step-by-step explanation:
You can't construct more than 1 triangle. If either of the angles shift, the triangle won't close. And a equilateral triangle must close to be considered, well, a triangle.
The freezing point is 0 degrees Celsius, and the boiling point is at 100 degrees. The difference is thus 100-0=100.