Matthew has 30 stamps in his collection. matthew's father has 10 times stamps as matthew. how many stamps does matthew's father have?

Determine the number of girls in a math class with 87 boys if there are 25 girls for every 75 boys

Ineed someone to me answer my question i have to have this done and knocked out

Janie has $3. she earns $1.20 for each chore she does and can do fractions of chores. she wants to earn enough money to buy a cd for $13.50.