Answer:
In the given figure:
The reflex angle
and 
[By vertical angle theorem]
From the given we can say that:
and
are supplementary angles.
Supplementary angles states that the two measure are add up to 180 degree.
⇒
.....[1]
then; the reflex angle DOB is:

Substitute the given values we get;

Subtract y from both sides we get;

Divide both sides by 2.5 we get;


We have to find the non reflex 
Non reflex angle DOB is;

Therefore, the non-reflex angle DOB is 108 degree.
Answer:
900
Step-by-step explanation:
5979 = 5000+70+9+□
5979 = 5079+□
5979-5079 = □
900 = □
Answer:
yes, that is correct
Step-by-step explanation:
- (20÷39) = - 0.513
- 0.513 * 1.43 = - 0.734 ~ - 0.75
To the find average of the test scores, we need to find the mean.
To find the mean, all we need to do is add up all the numbers and then divide the answer by how many numbers there are
81 + 83 + 85 = 249
249 ÷ 3 = 83
Therefore, the new average is 83
Hope this helps
Answer:
2.925 miles
Step-by-step explanation:
miles. Hope this helps!