For a daily airline flight between two cities, the number of pieces of checked luggage has a mean of 380 and a standard deviation of 20. What number of pieces of checked luggage is 3 standard deviations above the mean?

Mack is repackaging 6/8 pound bags of birdseed into 1 pound bags of birdseed. What is the least number of 6/8 pound bags of birdseed he heeds in order to fill 1 pound bags without leftover?

A company plans on selling MP3 players for $120. To make the MP3 players, a cost estimator determined it costs the company $1500 per week for overhead and $45 for each MP3 player made.

Is it possible to form a triangle with sides 20, 30, and 50 units?

Mary has 12 marbles 3/12 of the marbles are yellow and 2/12 of the marbles are blue. the rest of the marbles are green. how many marbles are green? explain how you know.

Do you multiply when you have an x right after a math number like this: 3x+4x = What would it equal?

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.