Any body know this will give brainliest

The measure of an angle formed by two secants, two tangents, or a secant and a tangent drawn from a point outside a circle is equal to half the difference of the measures of the intercepted arcs.

This theorem states that 27 would equal to half the difference between 128 and the measure of arc AC.

27 = 1/2 (128 - AC)
54 = 128 - AC
AC = 74

I'll do the first one for you. it isn't very hard at all.on number one, you have (50 × 3), which equals 150, and (3 × 3), which equals 9. after you establish that, you add 150 and 9 together. so, (150 + 9) equals 159.this means that 53 × 3 = 159.