Solve system of equation

x-y=11

2x+y=19

Ethan worked for 9 hours and 30 minutes. how should he write that on his time card?

Chris buys a car for $24,000. If the car loses value at a rate of 7% per year, what will it be worth in three years? Round to the nearest dollar.

Solve problem. In chemistry class, 6 liters of a 4% silver iodide solution must be mixed with a 10% solution to get a 6%solution. How many liters of the 10% are needed?

Solve for 4/5 x (-2/9)

What is the answer to mx + mx = p

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.