Answer: 16
explanation: 2.1 x 8 = 16.8
16 is the closest to 16.8
(x
1
,y
1
)=(2,3) and (x
2
,y
2
)=(4,7)
by midpoint formula, coordinates of mid point =(
2
x
1
+x
2
,
2
y
1
+y
2
)
=(
2
2+4
,
2
3+7
)=(
2
6
,
2
10
)=(3,5).
Answer:
The first one is not a function
The second is a function
Third not a function
Fourth is a function
Step-by-step explanation:
Answer:
x² + y² + 4x - 2y + 1 = 0
Step-by-step explanation:
The equation of a circle is given by the general equation;
(x-a)² + (y-b)² = r² ; where (a,b) is the center of the circle and r is the radius.
In this case; the center is (-2,1)
We can get radius using the formula for magnitude; √((x2-x1)² + (y2-y1)²)
Radius = √((-4- (-2))² + (1-1)²)
= 2
Therefore;
The equation of the circle will be;
(x+2)² + (y-1)² = 2²
(x+2)² + (y-1)² = 4
Expanding the equation;
x² + 4x + 4 + y² -2y + 1 = 4 subtracting 4 from both sides;
x² + 4x + y² - 2y + 4 + 1 -4 = 0
= x² + y² + 4x - 2y + 1 = 0
