It opens up
axis of symmetry is x=1
vertex is 1,0
x intercepts is -1,0,1,2,3,
y intercepts is 4, 1,0,1,4
11x -7y= -14 (1)
x -2y= -4 (2)
Multiply (2) by 11, we have:
11x -22y= -44 (3)
Take (1)-(3), we have:
(11x-11x)+ (-7y-(-22y))= -14-(-44)
⇒ -7y+22y= -14+44
⇒ 15y= 30
⇒ y= 30/15
⇒ y= 2
x= -4+ 2y= -4+ 2*2= 0
The final answer is x=0, y=2~
At 9 o clock, the hour hand is at 9 and the minute hand is at 12. The angle between the two hands is 90 degrees.
Circumference= 2×pi×R
Area= pi× R^2
Since Diameter=2 cm ---> Radius is 2× diameter , so R=4 cm
Circumference=2×3.14×4= 25.12 cm
area=3.14× (4)^2= 50.24 cm^2
