The answer is: if x represents the number of pencils per box, solve the equation 8x+4=196
These are the steps needed for this question hope this helps if there is any more questions do feel free to ask them
C.35%
If you divide the number of hearts drawn by the number of total draws you get your answer.
14/20=0.35
Using Gauss's method
Total number of terms = [15-(-129)]/4+1=36+1=37
Add
S=15+11+7+....-125-129
S=-129-125-...+7+11+15
--------------------------------
2S=-114-114-114...(37 times)
=>
sum=S=(1/2)*(-114)*37=-2109
Using AP, T(n)=15+11+7+....-129
T(n)=19-4n => T(1)=15, T(37)=-129
S(n)=(1/2)(37)(T(1)+T(37)=(1/2)37(15-129)=2109
