Determine whether this segment is tangent to the given circle.

It is not tangent

Step-by-step explanation:

If it were tangent, that angle A would have to equal 90 degrees since that just the definition of a line tangent to a circle, its perpendicular to the radius.  

If it were tangent, then we could use the pythagorean theorem to check if this is a right triangle and actually has angle A with 90 degrees.  a^2+b^2=c^2

4^2+12^2 does not equal 13^2.

If segment AC was 5, then it would be tangent but since its 4, the pythagorean theorem doesnt match up and therefore, it doesnt make a 90degree angle

If you dont understand my stupid explanation thats hard to explain then search this up on google

Using the Pythagorean Theorem to Determine Whether a Line is Tangent to a Circle

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option (b) is correct

step-by-step explanation:

to find the solution of this system, we need to convert it into reduced row-echelon form. we have,

after applying row operations r2 -> r2/2 and r3 -> r3/3, we get,