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
Answer:
60°
Step-by-step explanation:
Angle GHE = (360/6) ÷ 2 = 30
GEH = 180 - 90 - 30 = 60°
Answer:
It’s 4
Step-by-step explanation:
Answer: I think Its A. ..but I'm not completely sure
Step-by-step explanation:
Answer:
Simplified
2/5y + 1/5x - 413/50
or
0.4y + 0.2 x - 8.26
Step-by-step explanation: