What's 0.3 y + y / Z when y equals 10 + z equals 5

0

Step-by-step explanation:

y=10+z=5

z=5-10

z=-5

y=z+5

Substitute for y

0.3 y + y / Z

0.3(z+5)+(z+5)/z

z=-5

0.3(-5+5)+(-5+5)/-5

0.3(0)+0/-5

0.3/0

0

90°

Step-by-step explanation:

Actually the question should be AC is tangent to circle B at point C. What is the measure of angle BCA.

AC is tangent and BC is radius.

Radius is perpendicular to the tangent.

Therefore,

measure of angle BCA = 90°