Answer:
29
Step-by-step explanation:
R(x)-c(x)=x²-30x+20 choose C
If there are 250 bricks in a 20 feet high wall, there should be 125 bricks in a 10 feet high wall.
So to get a 30 feet high wall, you need to multiple 125 bricks by 3.
We put this into an algebraic equation, where <span>x = the number .
x + 17 > 26
x > 9
This </span>> is the greater than sign, we use this because it's no less than 26.
Ideally we would use this sign:
<span>http://etc.usf.edu/clipart/41700/41712/fc_greateq_41712_md.gif
because it could be equal to 26.
</span><span>The number is <u>greater or equal to 9</u>
</span>
Answer:

Step-by-step explanation:
Assuming the situation can be modelled using a linear equation, then the line must pass through the point (2,54) and (4,100).
To find the equation of this line, we determine the slope using:

Substitute the coordinates of the points:

We use the following formula to find the equation of this line.

We substitute the first point a d slope to get:

Expand the parenthesis to get:

This simplifies to

This is the slope-intercept from.