Respuesta :

120 pounds
hope that helps

Answer:

Weight of 4 boxes =  120 pounds

Step-by-step explanation:

Given  : 3 boxes of baseball cards weigh 90 pounds.

To find : How many pounds do 4 boxes weigh.

Solution : We have given

Weight of 3 boxes = 90 pound.

Weight of 1 boxes = [tex]\frac{90}{3}[/tex].

Weight of 1 boxes =  30 pounds.

So ,

Weight of 4 boxes =  30 * 4 pounds.

Weight of 4 boxes =  120 pounds.

Therefore, Weight of 4 boxes =  120 pounds