Answer:
21:9
Step-by-step explanation:
when you divide 21 and 9 by 3, you get 7 and 3 respectively
In the given triangle we have the following:
A. The sum of the inner angles of a triangle is always equal to 180, that is:

From this, we can solve for the sum of angles 1 and 2 and we get:

Now, we also know that angles 3 and 4 are supplementary angles and therefore their sum is 180 degrees, that is:

Solving for angle 4:

Equating both results we get:

Therefore, it is true that angle 4 is the sum of angles 1 and 2.
B. We have that the sum of angles 2 and 3 is:

If this were equal to angle 4 we would have:

B
Answer:
120 i think
Step-by-step explanation:
i mutilplyed 800 times 0.15 and got 120
Hello :D
To work this out we need to look at the thousands column. After you find the thousands column, you look at the column on the right side of it. If that number is higher than 5, you round it up. If it is 4 or lower, then you round it down.
990687
Thousands = 0687
It has a 6 next to it you round it up. So the answer would be 991000. I hope this helps