Answer:
-5 • (2w + 1)
—————
2
Step-by-step explanation:
<span>The ratio of all books to used books = all books ÷ used books = 15 / (15-6) = 5/3
</span>
<span> The ratio of new books to used books = new books ÷ used books = 6 / 9 = 2/3
</span>
<span>
I hope that
helps!
</span>
Answer:

Step-by-step explanation:
![8x + c = k\\\\8x + c-c = k -c \ \ \ \ \ \ \ \ \ [\ subtract \ c \ from \ both \ sides \ ]\\\\8x = k - c\\\\\frac{8x}{8} = \frac{k-c}{8} \ \ \ \ \ [ \ divide \ both \ sides\ by\ 8 \ ]\\\\x = \frac{k-c}{8}](https://tex.z-dn.net/?f=8x%20%2B%20c%20%3D%20k%5C%5C%5C%5C8x%20%2B%20c-c%20%3D%20k%20-c%20%5C%20%5C%20%5C%20%5C%20%5C%20%5C%20%5C%20%5C%20%5C%20%5B%5C%20subtract%20%5C%20c%20%5C%20from%20%5C%20both%20%5C%20sides%20%5C%20%5D%5C%5C%5C%5C8x%20%3D%20k%20-%20c%5C%5C%5C%5C%5Cfrac%7B8x%7D%7B8%7D%20%3D%20%5Cfrac%7Bk-c%7D%7B8%7D%20%5C%20%5C%20%5C%20%5C%20%5C%20%5B%20%5C%20divide%20%5C%20both%20%5C%20sides%5C%20%20by%5C%20%208%20%5C%20%5D%5C%5C%5C%5Cx%20%3D%20%5Cfrac%7Bk-c%7D%7B8%7D)
Answer:
Dale will reach his goal at an annual rate of 11.83%.
Step-by-step explanation:
The formula for continuos compounding is given by:

In which A is the amount after t years, P is the principal(initial amount) and r is the annual rate.
Dale has 2000 dollars to invest.
This means that 
He has a goal to have 5800 in this invest ment in 9 years.
So 
At what annual rate compounded continuously will Dale reach his goal?
This is r.








Dale will reach his goal at an annual rate of 11.83%.