The first four terms of a geometric sequence are 7, 14, 28 and 56.

a. write a recursive formula for the sequence.

b write and explicit formula for the sequence.

c. find the 20th term of the sequence.

Use the elimination method to find the solution to the system of equations. 2x - 3y = -9 -x + 3y = 6

The coordinates of vortex a’ are (8,4) (-4,2) (4,-,4) the coordinates of vortex b’ are (6,6)(12,-,12)(12,12) the coordinates of vortex c’ are(-2,,12)(4,12)(12,-4)

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?