The product of what number and 7 is less than 49

Jayne is studying urban planning and finds that her town is decreasing in population by 3% each year the population of her town is changing by a constant rate

Cora bought a package of erasers. there are 4 pink erasers and 12 blue erasers. what is the ratio of pink erasers to blue erasers?

The difference between two numbers is one. three times the larger number minus two times the smaller number is 9. what are the two numbers