The Riddler likes to send messages using the ratio of 5:7, which is the ratio of puzzles to riddles that he sends. If the Riddler sent 20 puzzles last week, how many riddles did he send?

What is the ratio of 15 and 40 in simplest form

Maria has $28 to spend on bottles of water Each bottle of water costs $1.29. There is a $1.50 recycling fee for buying bottled water.

A random sample of 150 recent donations at a certain blood bank reveals that 82 were type A blood. Does this suggest that the actual percentage of type A donations differs from 40%, the percentage of population having type A blood?

Fran paid a $50 registration fee to join the gym. she pays $20 each month. how much will fran pay for a year membership at the gym

A suit cost $95 Barry has a discount coupon for 10 %off and the city has 4.5%sales tax. what is the final cost of the suit?

A newspaper reporter wants to know how popular the hobby of bird watching is in the city. He asked people at the local bird refuge if they watched birds as a hobby. Which of the following best explains whether the reporters data is valid or not?

I am very confused on how to figure out if y = 3/4x is proportional?

Alison wants to buy a mountain bike for $339.12. If she saves $28.26 each month, in how many months will she be able to buy the bike?

At 12 o'clock the temperature was 7°C. The temperature decreased by - 20°C. What is the new temperature?

Ashleys rentals charges $27.50 per hour to rent a surfboard and a wetsuit. Darlas surf shop charges $23.25 per hour to rent a surfboard plus $17 extra for a wetsuit.