Two processes for hydraulic drilling of rock are dry drilling and wet drilling. In a dry hole, compressed air is forced down the drill rods to flush the cuttings and drive the
hammer. In a wet hole, water is forced down. As part of an analysis to determine the
cost of drilling a hole, an experiment was conducted in the Great-Karoo near Graaff-
Reinet to determine whether the time it takes to dry drill a distance of 5 meters in rock
increases with the depth at which drilling begins. The results for one portion of the
experiment are shown in Table 1.

Which addition property is being illustrated below? (type commutative or associative) (6 + 7) + 1 = 6 + (7 + 1)

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.

1.two more than the quotient of a number and 6 is equal to 7 use the c for the unknown number translate the sentence into an equation