It looks like you're given
Consider the geometric sum,
Multiply both sides by 1/2 :
Subtract this from S :
Solve for S :
The given sum is just 5 times S, so x = 1023 × 5 = 5115.
Don’t know if the people surveyed were students or not
Answer:
I figured it out by doing: 360/25 = 14.4
Step-by-step explanation:
F(6)=2/3(6)-5
f(6)=4-5
f(6)=-1
Final answer: f(6)= -1
You need to know that pi rad = 180°
Then 4 pi / 5 rad = 4 (180°) / 5
Those are numbers that you can multiply and divide wihout calculator and the result is 720 °/ 5 = 144 °