How many variables are in this equation:
2y + 5 = 5n

There are 2 variables in the equation. The variables are y and n

2

Step-by-step explanation:

variables are letters attached to numbers, so 2y has one variable (the y) and 5n has one (the n)

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