So making a simple equation helps to get all the information together
20 - 3.5X = 0.4
20 is the original. Minus the amount you paid for. equals the cash you got back
subtract 20 over
-3.5X=-19.6
Then divide both sides by -3.5
X=5.6
He bought 5.6 pounds
Answer:
5,20,80,320
Step-by-step explanation:
a1 = 5
an = 4 an-1
Let n = 2
a2 = 4 * a1 = 4*5 = 20
Let n = 3
a3 = 4 * a2 = 4*20 = 80
Let n = 4
a4 = 4 * a3 = 4*80 = 320
Answer:
n = 55/8
Step-by-step explanation:

Answer:
Please help im on that 2dd
Step-by-step explanation:
dddd
Answer:
The required recursive formula is:

Step-by-step explanation:
We are given a geometric sequence as:
6,-18,54,-162,.....
Clearly after looking at different terms of the sequence we could observe that the sequence is an geometric progression (G.P.) with common ratio= -3 denoted by r.
Let
represents the nth term of the sequence.
This means that:

As the common ratio is -3.
so,

Hence, the required recursive formula for the geometric sequence is:
