Is 4/5 a repeating decimal

No.

Step-by-step explanation:

4/5, when changed to a decimal, is a terminated decimal:

(4/5)(20/20) = 80/100 = 0.80

~

y = 2x

step-by-step explanation:

if you divide each number in the sequence, you'll see that they all have a multiple factor of 2. each number in the series, and any other numbers which may continue, will be multiplied by 2. therefore, y is the next number in the sequence, and x is the current one, so, our formula will be y = 2x.

y=3n + 1

step-by-step explanation:

this is wrong because it says the second number is one less and i added one instead