Given this unit circle, what is the value of x? (x, -7/10)(1,0)

x = -

Step-by-step explanation:

the equation of a circle centred at the origin is

x² + y² = r² ( r is the radius )

The radius of a unit circle is r = 1

substitute (x, - ) into the equation and solve for x

x² + (- )² = 1²

x² + = 1 ( subtract from both sides )

x² = 1 - = ( take square root of both sides )

x = ± = ±

since the point is in the 3rd quadrant then x < 0

x = -

option 1

data plot with   3 dots over 33, 1 dot over 34, 2 dots over 35, no dot over 36, 1 dot over 37, 2 dots over 38, 4 dots over 39, and 2 dot over 40.

i just took the test, the correct answer is .. 31.5 in.