It costs $140 to buy a cord of firewood, delivered to your house, and $80 to buy a half cord, delivered. assume that you pay a certain number of dollars per cord for the wood, plus a fixed number of dollars for delivery. how much do you pay per cord and how much for delivery?

50 ! pls ! 12.  building codes regulate the steepness of stairs. homes must have steps that are at least 13 inches wide for each 8 inches that they rise.

a. discuss how to find the slope of the stairs.
b. describe how changing the width or height affects the steepness of the stairs.

Gabriel determined that his total cost would be represented by 2.5x + 2y – 2. his sister states that the expression should be x + x + 0.5x + y + y – 2. who is correct? explain.

In which direction does the left side of the graph of this function point? f(x) = 3x3 - x2 + 4x - 2