Part A: 3x + 15 = 5x - 25
Part B: x = 20
It means for example instead of writing 2 2/5 You would write 12/5
You can find out an improper fraction by simply multiplying the denominator by the front number and adding the answer to you numerator
So, 2x5= 10. 10+2= 12. So 12/5
It's 100
Because You multiply the sample proportion to 2000
The best answer i think would get is C i hope im right