Answer:
Step-by-step explanation:
First sequence : 10,9.5,9,8.5,...
Let's see the difference between 2 numbers :
10 - 9.5 = 0.5
9.5 - 9 = 0.5
9 - 8.5 - 0.5
So on and so on. So, the common difference between these numbers are 0.5
Next sequence : 200,100,50,25, ...
We see, to get from one number to another, we divide it by 2 / multiply it by 1/2.
200 x 1/2 = 100
100 x 1/2 = 50
50 x 1/2 = 25
So on and so on. So, the common ratio of these numbers are 1/2.
Answer:
2
Step-by-step explanation:
if 60% is fiction, then 40% are non fiction
80 x 40% =
80 x 0.40 = 32
32 books are nonfiction
Option B is correct. The required expression on expansion of 20х-[2х -(х+2)-(6-x 2 )-(28 +x+x2] is 20x + 36
Expressions are function that does not include "equal" sign
Given the expression
20х-[2х -(х+2)-(6-x² )-(28 +x+x2]
Expand and collect the like terms
= 20х-[2х -х-2-6+x² -28 - x - x²]
= 20x - [x - 8 + x² - 28 - x - x² ]
x and x² cancels out from the expression to have
= 20x - [- 8 - 28]
= 20x -(-36)
= 20x + 36
Hence the required expression on expansion is 20x + 36
Learn more here: brainly.com/question/12293021
Answer:
3x+94+x+18+2x-4=180(being straight line)
6x+108=180
6x=180-108
x=72/6
x=12
Step-by-step explanation:
