Simplify the expression (2x-5y) + (x+y)

B = {1,3,5,7,9} 1. B x B?

What is the exact value of cos 2π/3.

Which improper fraction that is equivalent to the mixed number 6 4/7

If y equals - 12 when x equals 9 find y when x equals negative 4

F has 10 more marbles than I. Both boys have 15 marbles combined. How many marbles does each boy have? Show your work.

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.