28. 8x3=24 add four which gives you 28.
(n+12)(n-7) = n^2 + 5n - 84
Answer:
C
Step-by-step explanation:
Since there are two arcs and they both make up a circle, and a circle has 360 degrees.
NPL+NL=360
The measure of NPL is twice the measure of NL so
it now
2NL=NPL
Substitute that in the equation
2NL+NL=360
3NL=360
NL=120
Since NL subtends NML they are equal so NML=120
Let's assume the number of students in the class be x.
Given that, Two-thirds of students in a class are girls.
So, number of girls 
Now ne-half of the girls wear glasses. So, one-half of
is
= 
=
Cancel out 2 from both numerator and denominator.
So, one third of the students are girls who wear glasses.
So, the correct choice is E.