Is - 15 + 12 equavalent to 12 - - 15

Reid did a scientific project and studied 512 catfish, 232 bass, and 181 trout. How many fish did he study in all?

If a hospital patient is given 50 mg of medicine, which leaves the bloodstream at 10% per hour, how many mg of medicine will remain in the system after 6 hours?

Find the quantity represented by each percent 45% of 96 quarts

The ratio of girls to boys is a student basketball league which is 5:2 or false for each statement

Twenty four 750 milliliters bottles are shipping out of the warehouse. In total, how many liters were shipped?

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.