An=a1r^(n-1)
given
a5=1/24
a10=1/768
we know that
a5=1/24=a1r^(5-1) and
a10=1/768=a1r^(10-1)
so
1/24=a1r^4
1/768=a1r^9
(a1r^9)/(a1r^4)=r^5=(1/768)/(1/24)=1/32
r^5=1/32
take 5th root of both sides
r=1/2
we have
a5=a1r^4=1/24
evaluate r^4 or (1/2)^4
1/16
a1(1/16)=1/24
times both sides by 16/1
a1=16/24
a1=2/3
the first term is 2/3
Answer:
Yes you did good job
Step-by-step explanation:
Answer:
-1x - 3 or -x - 3
Step-by-step explanation:
1/5 (5x - 15) - 2x =
1x - 3 - 2x =
1x - 2x - 3 =
-1x - 3
6.438 is the final answer
Answer:
It's Emily's class. They have 20 students while Santiago's class has 18.
Step-by-step explanation:
75%=0.75=3/4. If 3/4=15, then 1/4 =15/3=5. So 4/4=5x4=20.
2/3=12. 1/3=12/2=6. 3/3=6x3=18.