BA and BD are radii of the circle, so triangle ABD is isosceles. Then angles BDA and BAD are congruent, and the remaining (central) angle ABD has measure

$m\angle ABD=(180-2\cdot20)^\circ=140^\circ$

Angles ABD and CBD are supplementary, so

$m\angle CBD=(180-140)^\circ=40^\circ$

and the answer is E.

8 0

4 years ago

I’m struggling a bit on this question, may someone help me please

Leto [7]

Answer:

k = 2

Step-by-step explanation:

Use a graphing calculator

6 0

3 years ago

Helpppp please hurryyyy

tigry1 [53]

Answer:

X=7 and y is y=40 length is 47

Step-by-step explanation:

3 0

3 years ago

There are 8 books in a shelf that consist of 2 paperback books and 6 hardback books. If 4 books are selected at random without r

mixer [17]

Answer:D

Step-by-step explanation:

This is combination.

If 4 books selected out of eight book in the shelf:

(4 combination 8)= 70

For hardback selection:

Then selection of 4 books out of the hardback, it means there is no paperbach will be:

(4 combination 6)= 15

So , if at least one paperback selected will be : 70-15

That is 55

4 0

3 years ago