Answer:
a²(b² - 2b) = a²b² - 2a²b
- a²(b² - 2b) is odd but -2a²b is the even number
=> a²b² must be the odd (because an odd number minus an even number equals an odd number)
=> a and b are odd (proven)
Answer:
8a+7b
Step-by-step explanation: 6+2=8 3+4=7
Answer:
A. 6.5
Step-by-step explanation:
First we find the average
of the 9 data:

Where n is the data number, that in this case is 9.

The formula of the standard deviation
is:

We replace the data and find the value of the standard deviation:


We approximate the number and the solution is 6,5
Answer:
10
Step-by-step explanation:
13+-8-(-5)+10
Help with what tho you need help with what I don’t see it