Question

A typical American baby weighs 8 pounds at birth and gains about 1.5 pounds per month for the first year of life. The equation below represents this situation. Weight is (w) in pounds and (a) is age in months. w = 1.5m +8 Using the equation above, how old is an American baby that weighs 11 pounds? Show your work.​

Answer 1

An American baby that weighs 11 pounds is 2 months old.

Step-by-step explanation:

To find the age of an American baby that weighs 11 pounds, we can use the equation w = 1.5m + 8, where w represents the weight in pounds and m represents the age in months. We can plug in the weight of 11 pounds into the equation and solve for m:

w = 1.5m + 8

11 = 1.5m + 8

Subtracting 8 from both sides:

3 = 1.5m

Dividing both sides by 1.5:

2 = m

Therefore, an American baby that weighs 11 pounds is 2 months old.