Prove:cosec 2A + cosec 4A = cot A-cot 4A

At the market, grapes cost $0.85 per pound. Clarissa buys grapes and pays a total of $2.55. How many pounds of grapes does she buy?

Which expression is equivalent to 19x - 6x + 2 and why?

Simplify: 6C5 A. 1 B. 6 C. 30 D. 720

Does soil without nitrogen decrease the weight of worms compared with soil with nitrogen? the weight of 14 randomly selected worms is acquired, seven in soil with nitrogen and seven in soil without nitrogen.

Find the size of the final unknown exterior angle in a polygon whose other exterior angles are: 63', 64°, 82°, 49° and 58°

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.