Answer:
Step-by-step explanation:
Given the fraction

Multiplying numerator and denominator by 5


Therefore,
Similarly,
Given the fraction

Multiplying numerator and denominator by 2


Therefore,
2(-1) + 3 = -2 + 3 = 1 Hence the third option.
Select 4 from 9, and 3 from 8. Multiply together.
C(9,4)*C(8,3)
=9!/(4!5!) * 8!/(3!5!)
=7056
she would need 166 boxes. there is a remainder of 1. one book wont fit in a box