A new born infant usually triples its weight by its first birthday. Baby Carter weighed 28 pounds on his first birthday. if this were triple his birth weight (b),which equation below-birth weight?

(1) b/3= 28
(2) b-3=28
(3) 3b=28
(4) b+3=28
(5) 3(b+3)=28

I believe my answer that I figured is #1 ?? am I right

1) can't be right. If his birth weight was 9 pounds, then 9/3 = 3

hummm ok let me try something different Ms. Sue

OK Ms. Sue this one is really giving me trouble

but I'm thinking it might be #5 ??

To determine the correct equation, let's break down the information given.

We are told that a newborn infant usually triples its weight by its first birthday. This implies that the weight on the first birthday (28 pounds) is three times the birth weight (b).

So, using this information, we can write the equation as follows:
3b = 28

After simplifying the equation, we get:
b = 28/3

Therefore, the correct equation is option (3) 3b = 28.

Your answer is correct! Well done!