The size 4 soccer ball Sean's team uses should weigh no more than 0.37 kilogram, and no less than 0.31 kilogram. A soccer bag has two balls in it. what is the most they could weigh together? The least?

Maximum weight = 0.74 kg

Minimum weight = 0.62 kg

Explanation;

Let weight of football of Sean's team uses be A.

It is given that, 0.31≤ A ≤ 0.37

The bag has two balls. Both ball has weight in between the above condition.

Maximum weight is achieved when both balls has weight 0.37 kg

Maximum weight = 0.37 + 0.37 = 0.74 kg

Minimum weight is achieved when both balls has weight 0.31 kg

Minimum weight = 0.31 + 0.31 = 0.62 kg