Form a sequence that has two arithmetic means between - 1 and 59.

a.

-1, 29, 29, 59

c.

19, - 1, 59, 39

b.

-1, 19, 39, 59

d.

-1, 14, 29, 44, 59

The formula for solving the problem is as follow:

an = a1 + (n - 1) d

Where:

n = number of figure in the sequence = 4

d = difference between successive number = ?

a1 = - 1

a4 = 59

Insert the given values into the formula,

59 = - 1 + (4 - 1) d

59 = - 1 + 3d

59 + 1 = 3d

60 = 3d

d = 60/3 = 20

Therefore, d = 20. This implies that, there is a difference of 20 between successive numbers.

The number sequence is as follow:

-1, 19, 39, 59.

two arithmetic means between - 1 and 59.

b.-1, 19, 39, 59