I estimated it is around or near 360
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
2d + 14 ( "d" is the number of days after today, and "14" comes from how many feet deep the water is today)
Answer:
1. 343
2. 64
3. 81
4. 12.25
Step-by-step explanation:
Answer: she stopped to change a flat tire
Step-by-step explanation:
