Jay’s dog weighs 35 kilograms and is overweight. The dog is put on a diet, losing 0.4kg every week. How long does it take to reach the target weight of 28 kilograms? (This is a question from arithmetic sequence)

17.6 weeks

Step-by-step explanation:

The computation of the time taken to reach the target weight is shown below:

35, 34.6, 34.228

As we know that

a_n = a + (n - 1)d

28 = 35 + (n - 1)(-0.4)

28 = 35 -0.4n + 0.4

28 = 35.04 - 0.4n

0.4n = 35.04 - 28

0.4n = 7.04

n = 17.6

answer:   b

step-by-step explanation:

x2 = 16

x can not be a negative number because 16 is positive

the only answer would be positive 8