A crew is digging a man-made lake. They started in the morning and then had lunch. After the lunch break, the crew dug down another 1.8 feet before heading home. Before they left, the boss said, "If you dig the amount you dug today every day, then it will take you 3.5 days to finish." The bottom of
the lake will have an elevation of —27.3 feet
.
What was the lake's elevation before the lunch break? We don't know, so let's call it b for break elevation.
Which expression represents the elevation of the lake at the end of the first day?
ob- 1.8
o 1.8 - 6
0
Ob + 1.8

Quick! a survey of 57 customers was taken at a bookstore regarding the types of books purchased. the survey found that 33 customers purchased mysteries, 25 purchased science fiction, 18 purchased romance novels, 12 purchased mysteries and science fiction, 9 purchased mysteries and romance novels, 6 purchased science fiction and romance novels, and 2 purchased all three types of books. a) how many of the customers surveyed purchased only mysteries? b) how many purchased mysteries and science fiction, but not romance novels? c) how many purchased mysteries or science fiction? d) how many purchased mysteries or science fiction, but not romance novels? e) how many purchased exactly two types of books?

Find the center of the circle that can be circumscribed about efg with e(4,4) f(4,2) g(8,2)

Ashley spent half of her lunch money on a turkey sandwich. then she spent two-thirds of the money she had left on a bottle of juice and the rest of the money on a cookie. if the cookie cost $.75, how much lunch money did ashley have to start with?