Y = x^2 + 2x + 9 = x^2 + 2x + 1 + 8 = (x + 1)^2 + 8
Vertex = (-1, 8)
Answer:
Area of the circle is 6.25π sq.unit
Step-by-step explanation:
The centre of the circle is at the mid point of a diameter. Th mid point of the diameter is at (5+22,5+12)or(72,3),which is centre. Radius is the distance from end point (5,5)to centre (72,3)∴r=√(5−72)2+(5−3)2=√1.52+4=√6.25=2.5∴
Area of the circle is Ac=π⋅r2=π⋅2.52=6.25π sq.unit[Ans]
Step-by-step explanation:
y = -6x + 10 (1)
-5x + y = -1 (2)
Sub (1) into (2)
-5x + (-6x + 10) = -1
-5x - 6x + 10 = -1
-11x = -11
-11x/-11 = -11/-11
x = 1
Sub x = 1 into (1)
y = -6(1) + 10
y = -6 + 10
y = 4