Question

if the point (2/3 y) is on the unit circle what is y?

a. 2/3
b. 1/3
c. sqrt 5/3
d. 4/9

Answer 1

All points on the unit circle satisfy the property \(x^2+y^2=1\)

Answer 2

Solve \(\Large\left(\dfrac23\right)^2+y^2=1\) to find the answer

Answer 3

idk if its sqrt of 5/3 or 4/9 because y^2 +4/9=1

Answer 4

Continue please your work

Answer 5

so its 4/9

Answer 6

No it's not

Answer 7

Step by step please?

Answer 8

\[\Large\begin{array}{rcl}
\left(\frac23\right)^2+y^2&=&1\\
\frac49+y^2&=&1\\
y^2&=&\frac59\\
y&=&\frac{\sqrt5}3
\end{array}\]

Answer 9

How did you get 4/9 as the answer?

Answer 10

ohhh ok i didnt do the second half