Question

write the equation of the circle that passes through the point (√5,0) and whose center is the origin
A. x^2+y^2=5
B. x^2+y2=2√5
C. x^2+y^2=√5
D. x+y^2=5
E. None of these

Answer 1

I'll draw u a pic

Answer 2

can you work out which answer above is the correct one?

Answer 3

c?

Answer 4

nope

Answer 5

I gave u a hint above

Answer 6

so must be B

Answer 7

x^2 + y^2 = r^2
and r = SQRT(5)
so r^2 = 5

it's not B and if you say D then I'll jump of the 10th floor ;)

Answer 8

LOL so its a(:

Answer 9

are you sure?

Answer 10

pretty sure

Answer 11

good for you

Answer 12

1 help me with another? please..identify the coordinates of the vertex and the equation of the axis of summetry of the parabola

x=2 (y-1)^2+3

A. The vertex of the parabola is (1,3), and the equation of the axis of symmetry
B. the vertex of the parabola is (3,1) and the equation of the axis of symmetry
c. the vertex of the parabola is (3,1) and the equation of the axis of symmetry is y=1
D. None of these

Answer 13

please post it seperately in case I get stuck then others can assist, ta

Answer 14

k…thank you

Answer 15

yw