Answer:
D. 39°
Step-by-step explanation:
mAB = (3x + 9°)
mCD = (11x – 71)
From the diagram: |AB|=|CD|
Since arcs AB and CD are subtended by a chord of equal length.
mAB=mCD
3x + 9°=11x – 71°
Collect like terms to solve for x
11x-3x=9°+71°
8x=80°
x=10°
Therefore, the measure of AB:
mAB = (3x + 9°)
=3(10)+9
=30+9
=39°
The correct option is D.
50 / 100 = .5
.5 is 1% of 50
.5 * 20 = 10
Does that help?
7y + 3y = 180
10y = 180
y = 180/10
y = 18
so < 9 = 7y = 7(18) = 126
< 10 = 3y = 3(18) = 54
< 9 and < 11 are corresponding angles....so they are equal....so < 11 is 126 degrees....< 11 and < 16 are vertical angles...so they are equal....so < 16 is 126 degrees <==
First you move. -x for +x
2y = 16 + x
y = 8 + 1/2 x
the answer is
y = 1/2x + 8