A construction crew is pouring concrete to make a floor in a building. The weight, w, of the a
concrete is proportional to the volume of concrete, v, that has been poured. After pouring 5
cubic feet, they know the weight of the concrete is 740 pounds.
(a) If the construction crew uses a total of 12 (b) The crew wants to create an equation of
cubic feet of concrete, set up and solve a the form w=k-y to calculate the weight,
proportion for the amount the concrete w, of the concrete based on its volume, v,
weighs, w.
in cubic feet. What is the value of k in this
equation? Explain.

At the olympic games, many events have several rounds of competition. one of these events is the men's 100-meter backstroke. the upper dot plot shows the times (in seconds) of the top 8 finishers in the final round of the 2012 olympics. the lower dot plot shows the times of the same 8 swimmers, but in the semifinal round. which pieces of information can be gathered from these dot plots? (remember that lower swim times are faster.) choose all answers that apply: a: the swimmers had faster times on average in the final round. b: the times in the final round vary noticeably more than the times in the semifinal round. c: none of the above.

Write the expression in complete factored form. 5n_(c - 3) - n(c - 3) =

Asmall business produces and sells balls. the fixed costs are $20 and each ball costs $4.32 to produce. each ball sells for $8.32. write the equations for the total cost, c, and the revenue, r, then use the graphing method to determine how many balls must be sold to break even.