Sn=sum of the n terms of the geometric sequence.
a= the first term
r=the common ratio
n=numbers of terms.
Sn=a[(1-r^n)/(1-r)]
In this case:
a=-3
r=a₂/a₁=15/-3=-5
n=9
S₉=-3[(1-(-5)⁹) / (1-(-5))=
S₉=-3(1+1953125)/6)=
S₉=-3(1953126/6)=
S₉=-3(325521)
S₉=-976563
Answer: A. -976563
It’s increased to 9. A square is equal on all sides.
3 hats each is the largest amount Anthony can buy.
to get this answer i multiplied 3 friends by $5 ( amount of each hat) and got $15.
i divided that into $57 and got 3.8. So he can only afford to get each friend 3 hats each. Anthony should have $12 left
Answer:
{12,15}
Step-by-step explanation:
54 = 2(L + W)
27 = L + W
27 - L = W
LW = 180
L(27 - L) = 180
27L - L2 = 180
0 = L2 - 27L + 180 FOIL
0 = (L - 12)(L - 15)
{12, 15}
