5/2x + 3 = 4/x x = -1 x = -4 x = 4

x = 0.5

Step-by-step explanation:

5 + 6x = 8

5 - 5 + 6x = 8 - 5

6x = 3

x = 0.5

see explanation

step-by-step explanation:

since the sequence is geometric there is a common ratio r between consecutive terms, that is

r = 4 ÷ - 2 = - 2

r = - 8 ÷ 4 = - 2

r = 16 ÷ 8 = - 2

the next term - 13 must be incorrect as it should be - 32 for the sequence to be geometric.

the first 4 terms are therefore geometric with common ratio r = - 2