Answer:
9,948,394.
Step-by-step explanation:
Here, the other races is 4% of the total population. So we calculate 4/100 * 248,709,873=9,948,394.92. If you can't have a fractional amount of people is would be 9,948,394.
Because there are only two things you can do with these two " family" members. 81 divided by 9 is 9. 9 times 9 is 81. Strictly speaking, there should be three in the family: 9,9 and 81 9 is the square root of 81. 81 is the 9 squared.
Remember that the angles in a triangle add to 180 degrees. So, to solve, you add the two angles you have and subtract that difference from 180.

The final simplified answer is 6a + 5.