Four rectangular placemats, each with a perimeter of 36 inches, are on a square table that is 4 feet long. If the placemat is 12 inches long, what is the area of the table not covered by the four placemats?

If t17 = 3 (t5) in an arithmetic progression, find t1 in terms of d.

Maria found the least common multiple of 6 and 15. her work is shown below. multiples of 6: 6, 12, 18, 24, 30, 36, 42, 48, 54, 60, . . multiples of 15: 15, 30, 45, 60, . . the least common multiple is 60. what is maria's error?

Atotal of 505 tickets were sold for a school play they were either adult tickets or student tickets they were 55 more student tickets so than adult tickets how many adult tickets were sold ?