As mentioned mean is b . you multiply it with 8 so the data would 8b.
Answer:
See explanation
Step-by-step explanation:
Consider the expression

First, factor it:

Note that

Then

This shows that number 100 is a factor of the expression
and, therefore, this expression is divisible by 100.
We have sequence equation
.
In this case n is a natural number (1, 2, 3, ...).
So start inserting and computing value of
given that you know the value of n and a.
(first term)

Hope this helps.
The substitution method means you replace the variable in one equation with the other equation, so your new equation is x+4x-8=10. Add 10 to both sides to get 5x=18. Divide both sides by 5 to get x=3.6. This is a weird equation, but then to get y, work backwords. 3.6 times 2=7.2. 7.2-4=3.2 y=3.2. Finally to finish checking solve the equation as normal. 3.6+6.4=10. I hope this helped! Please give brainliest!
Your final answer is x=3.6 y=3.2
639÷9=71. You can check your answer by doing 71x9=639