Please help I’m stuck on this question. What expression is equivalent to
7m^2 + (2m-1) (m+9)

In a box lenght 1m breadth 60 cm and height 40 cm small rectangular packets of dimension 5 cm into 8 cm into 10 cm are packed. how many such small packets can be packed in the big box?

Olivia uses the work below to determine 55% of 720 which explains the error in olivia’s solution

Acoin bank containing only dimes and quarters has 12 more dimes than quarters. the total value of the coins is $11. how many quarters and dimes are in the coin bank?