Question

write an equation of a circle with the given center and radius.
center (2, 4) and radius 5

(x – 2)2 + (y + 4)2 = 5
(x + 2)2 + (y – 4)2 = 5
(x + 2)2 + (y – 4)2 = 25
(x – 2)2 + (y – 4)2 = 25

Answer 1

\[(x-x _{1}^{})^2+ (y-y _{1}^{})^2 = r^2\]

Answer 2

so x1 =2 and y1 =4 and r=5

Answer 3

just put the values

Answer 4

D....thank you!

Answer 5

Help me with another one please??! :)
find an equation of a parabola with a vertex at the origin and directrix y = –1.5.

Answer 6

@aajugdar

Answer 7

x =1/6 –y2
x =1/6 y2
y =1/6 –x2
y =1/6 x2

Answer 8

where p is the directrix

Answer 9

\[x^2=4py\]

Answer 10

x=1/6-y^2

Answer 11

no
its y=-x^2/6

Answer 12

\[x^2= 4py .....x^2=-6y .....\] divide by -6
\[-x^2/6 =y\]

Answer 13

got it?

Answer 14

yea thx

Answer 15

originally it would be x=1/6y^2?

Answer 16

wait wait

Answer 17

y =1/6 –x2
is this option
\[y=\frac{ 1 }{ 6 }(-x)^2 \]
then it is correct

Answer 18

no
something is wrong
write the options with LateX

Answer 19

write them using equation