Answer:
The value of 
Step-by-step explanation:
Being the general expression of the sequence:

We replace the value n=12 to get

22cm is the greatest
It should be greater than17(20-3)
and smaller than 23(20+3)
Answer:
Step-by-step explanation:
The first cat eats 1/15 of a bag per minute.
The second cat eats 1/10 of a bag per minute.
Together, they eat 1/15 + 1/10 = 1/6 of a bag in one minute.
Answer:
x=5/7
Step-by-step explanation:
3(x-2)+7x=1/2(6x-2)
3x-6+7x=3x-1
10x-6=3x-1
10x-3x=-1+6
7x=5
x=5/7
Answer:
3+7+11+15+(4n-1) = N(2n+1)
Step-by-step explanation:
atleast that's what i got-