41º
1) Since we want to find the reference angle for a -139º angle, we need to resort to the following formula
2) Note that a -139 angle is in quadrant III, since negative angles are clockwise oriented
3) Thus the Reference Angle is 41º
Answer:
The answer is Computer Experience.
Step-by-step explanation:
To find the distance traveled, we multiply the speed by the time. In this case, one person travels 60t miles in one direction, and the other person travels 50t miles in the other direction. So at any time t, the distance between the two people is 60t + 50t = 110t.
Given that the distance between them is 440 miles, we can solve for t with the following equation:
110t = 440
t = 4 hours
Answer:
Step-by-step explanation:
The area 
of a triangle is equal to half the product of its length (L) because of its height (h).
The base of the triangles is 
The height of the triangles is 
Then the area of one of the triangles is:
The figure is formed by 12 equal triangles, then the area of the figure 
is:
Answer:
164 and 287
Step-by-step explanation:
Their difference is 7-4 = 3 ratio units, so each ratio unit must stand for 123/3 = 41.
Then the numbers are 4·41 and 7·41, or 164 and 287.
