The answer is

. I've demonstrated the 'split and combine' method in the image attached.
This principal is based on the fact that you can multiply and divide radicals as you would with regular integers, but you remember that the answers remain as radicals unless the number you're dealing with is a square (e.g. 9, 16, 25).
Answer:
<em>2,4,6,8,10</em>
Step-by-step explanation:
To find the first 5 terms we can substitute numbers for "n"
We can create a table:
x y
1 2
2 4
3 6
4 8
5 10
To get the values we just plug in numbers:
a(1)=2(n)
a(1)=2(1)
a(1)=2
a(2)=2(2)
a(2)=4
...... etc.
set up a table (multiply across and add down - <em>don't add the middle column). Use the equation created by the "Total" row to solve for the variable.</em>
Quantity (times) % equals Total
Sol'n 1: x * .80 = (x)(.8)
<u>Sol'n 2: 15 - x * .30 = (15 - x)(.3)</u>
Total: 15 * .50 = .8x + .3(15 - x)
15(.5) = .8x + 4.5 - .3x
7.5 = .5x + 4.5
3.0 = .5x
6 = x
Answer: 6 liters of 80% and 9 liters of 30%
Answer:
8.50
Step-by-step explanation:
So right where the arrow is is 17 pounds, and on the lower numberline, it goes, 5, 5.5, 6, 6.5, 7, 7.5, 8, 8.5
Answer:
21.875 percent decrease
Step-by-step explanation: