80% of 90 would be bigger because:
80/100*80=72
We can say that the ratio of males to females is 5:3 and we can solve this:
The total number of parts is 5+3 = 8
520/8 = 65
We can rewrite the ratio as:
5*65:3*65
325:195
Therefore there was 325 males
-15 < 3n < 6
Divide all sides by 3
-5 < n < 2
Now you need all integers between -5 and 2.
-4, -3, -2, -1, 0, 1
Use the trick x+ y+ z =0 and 6+8+z=0,...so z= -14
