<h3>
Answer: Choice A</h3>
What we do is simply replace every n with k+1. So (3n)^2 turns into (3(k+1))^2
We see that only choice A has the correct term mentioned on the left hand side, so this must be the answer.
The right hand side is treated the same way. We plug in n = k+1. Your teacher did a bit of algebraic manipulation to get what is shown for choice A.
Can you show the choices you have
The answer is $9.13, have a fabulous day!
Answer:
The total number of CDs sold is 30, and the number of videos is 10.
Step-by-step explanation:
Consider A is the number of Videos sold.
Consider B is the number of CDs sold.
So,
A+ B= 40, B=40 -A
and
$6*A+ $4*B=$180
Replacing, B=40 -A in the second equation
$6*A+ $4*(40 -A)=$180
Distributive property
$6A+ $160 -$4A=$180
$6A -$4A=$180 - $160
$2A=$20
A=$20/$2=10
and B=40 -A, so B=40-10=30
That means, the number of Videos sold is 10
And the number of CDs sold is 30
