Determine if line ab is tangent to the circle.

7) No

8) Yes

Step-by-step explanation:

Tangent lines are perpendicular to the radius lines at the point of intersection.  So we just need to check if these are right triangles.

7) c² = a² + b²

20² = 12² + 14²

400 = 340

No

8) c² = a² + b²

13² = 7.8² + 10.4²

169 = 169

Yes

c: y > - 1/6x + 1

step-by-step explanation:

dashed line - meaning this < or > also not equal

solid line - meaning this < or > also equal

your answer is c because y > means up & it's shaded up, but y < means down

hope this ! : )

what i would say the best answer is a. 40.5