5.
y=mx+b
y=1/2x+3
6.
y=mx+b
y=-2x+5
(Just plug in the numbers)
not sure how the first two pictures apply here, since they're just a single circle.
check the picture below.
the one on the left can have 3 common tangent lines, the one on the right, only two common ones.
X = 37 degrees.
Sine and cosine are complementary, which means when they are added together, the equal 90. So, to find sine, subtract 53 from 90, to get x = 37.
Here is an image to show this.
I hope this helps!
Answer:
yes , an arc can indeed determine the circumference of a circle