Answer: 
, where n is a natural number.
Step-by-step explanation:
A series can be represented in a summation or sigma notation.
Greek capital letter, ∑ (sigma), is used to represent the sum.
For example: 
, where n is a natural number.
The given series : 1,4,9,16 which can be written as 
.
So , we can write it as
, where n is a natural number.
Answer:
1:4
Step-by-step explanation:
Let X be the quantity of 30% acid and Y be the quantity of 5% acid.
0.3X + 0.05Y = 0.1(X+Y)
0.3X + 0.05Y = 0.1X + 0.1Y
0.3X - 0.1X = 0.1Y - 0.05Y
0.2X = 0.05Y
X/Y = 0.05/0.2
X/Y = 1/4
X:Y = 1:4
Answer:
Well, if this were to be 
= Before Christ, the years would go back.
Step-by-step explanation:
And that's why the question is trying to trick you. So in 1990 BC the person is 15 years old. 5 years later, the same person is now 10 years. 5 years back is the order of the BC concept. Hope this makes sense!
Y=14x-2y is equal to 1 fourth x minus 2
Explanation: use rise over run use each answer to see which fits the graph.
Answer: Reuse is the action or practice of using an item, whether for its original purpose or to fulfill a different function
Step-by-step explanation:
