Sum of an infinite geometric sequence with the common ratio r, and the first term a1 is
![\frac{a_1}{1-r}](https://tex.z-dn.net/?f=%20%5Cfrac%7Ba_1%7D%7B1-r%7D%20)
we notice
-2 times -1/4=1/2,
1/2 times -1/4=-1/8
so a1=-2
r=-1/4 or -0.25
so the sum is
![\frac{-2}{1-(-0.25)}](https://tex.z-dn.net/?f=%20%5Cfrac%7B-2%7D%7B1-%28-0.25%29%7D%20)
=
![\frac{-2}{1+0.25}](https://tex.z-dn.net/?f=%20%5Cfrac%7B-2%7D%7B1%2B0.25%7D%20)
=
![\frac{-2}{1.25}](https://tex.z-dn.net/?f=%20%5Cfrac%7B-2%7D%7B1.25%7D%20)
=
![\frac{-8}{5}](https://tex.z-dn.net/?f=%20%5Cfrac%7B-8%7D%7B5%7D%20)
=
the sum is -8/5 or -1.6
Answer: y = 0.75x + 80
Step-by-step explanation:
let x = 1 mile
y = 0.75x + 80
Answer is D because he charge 10 $ mowing free +3 per square yard of lawn
lawn has dimensions:
x and y
Area= x*y=xy squar yard
so charge is
10 +3*Area=10+3xy
Answer:
hope this might be useful
The volume is equal to 134.041