Answer:
a)
, b)
or
, c)
or 
Step-by-step explanation:
a) The function is solved by factorization:

b) The function has the following form:


The roots of the polynomial are found by factorization:

or 
c) The function has the following form:


The roots of the polynomial are determined by the General Formula for the Second-Order Polynomial:




Answer:
165 students (hope it helps)
Step-by-step explanation:
300students - 45students = 255students
180students + 150students = 330students
330students / 2 = 165
720 divided by 72 is 80
7 tens divided by 9 is 8
54cm is equivalent to 0.59 yards
5h 30m + 6h 6m + 6h 30m = 17 hours and 66 minutes or 18 hours and 6 minutes.
1,110 minutes total.
Hope I helped! :)