Answer:
First, we use distributive property:
Now, remember that 
, then
Then,
1 = 10
2 = 12
3 = 14
4 = 16
5 = 18
6 = 20
Δweight
------------- =
Δ cost
2-1
------- =
12-10
1
—
2
<span>y-intercept: set x=0 </span>
<span>y = 3(0)^2 - 6(0) - 8 </span>
<span>y = -8 </span>
<span>x-intercept: set y=0 </span>
<span>0 = 3x^2 - 6x - 8</span>
To answer, we let x be the 4th term. We use the concept of geometric mean in order to answer this question. The ratio of the fourth term and the third term is equal to the ratio of the fifth term and the fourth term. That is,
x/40 = 10/x
The values of x from the equation are 20 and -20.
If he cuts the board into 7 pieces, that will require 6 cuts with his saw. Therefore, he will lose 6 * .125, or .75 feet for all of the cuts, resulting in 17.25 feet in total after the cuts.
