Answer:
It is not.
Step-by-step explanation:
For XY to be a tangent XY must be perpendicular to radius at point of contact with circle (X).
Perpendicular also means 90° angle between XY and radius.
90° angle means XYZ should be a right angled triangle
Test for right angle triangle: pythagoras theorem.
3.6²+2.7²≠1.8²
Hence not right angled. XY not a tangent.
Answer:
1*(9+7):(2+6)*1=2
Step-by-step explanation:
Answer:
The parabola's axis of symmetry is x = -6
Step-by-step explanation:
Parabola general equation:
y = a*(x - r1)*(x - r2)
Equation given:
y = (-1/4)*(x + 2)*(x + 10)
a = -1/4
r1 = -2
r2 = -10
To check if the parabola passes through the point (2, 10) it is necessary to replace x = 2 and check the y-value, as follows:
y = (-1/4)*(2+ 2)*(2 + 10) = -12
Then, point (2, 10) is not included in the parabola.
If a > 0 then the parabola opens upward; if a < 0 then the parabola opens downward. Then, the parabola opens downward
Axis of symmetry:
h = (r1 + r2)/2
h = (-2 + -10)/2 = -6
Then, The parabola's axis of symmetry is x = -6
To find Parabola's vertex, replace with the axis of symmetry:
y = (-1/4)*(-6 + 2)*(-6 + 10) = 4
Therefore, the parabola has a vertex at (-6, 4)
Answer:
2
Step-by-step explanation:
