Your answer is incorrect.
there are
90
students in a speech contest. yesterday,
2/5
of them gave their speeches. today,
2/3
of the remaining students gave their speeches. how many students still haven't given their speeches?

Frank has a devised a formula for his catering business that calculates the number of meatballs he needs to prepare. the formula is m=4a+2c, where c=number of children; m=number of meatballs; a=number of adults. how many meatballs are required for a party of 10 adults and 5 children?