2(4 - 2r) = -2(r + 5)
First, divide both sides by -2. / Your problem should look like:
Second, regroup your terms. / Your problem should look like:
Third, add 4 to both sides. / Your problem should look like:
Fourth, add r + 5 + 4 to get r + 9. / Your problem should look like:
Fifth, subtract r from both sides. / Your problem should look like:
Sixth, subtract 2r - r to get r. / Your problem should look like:

Answer:
r = 9
Answer:
5b+40
Step-by-step explanation:
distributive property
B
Because 2 sqrt5 is = to sqrt 20.
4^2=16, 6^2=36
Answer:
The cost function for
is
.
Step-by-step explanation:
The marginal cost function (
) is the derivative of the cost function (
), then, we should integrate the marginal cost function to find the resulting expression. That is:

Where:
- Fixed costs, measured in US dollars.
If we know that
and
, then:


The cost function for
is
.
Answer:
Step-by-step explanation: