2x-y=3; x=2 how do I solve this

An animal shelter had a lot of dogs. 53 dogs were adopted. Now the animal shelter has 15 dogs left. How many dogs were in the animal shelter to start? There were __dogs in the animal shelter to start.

Ron gets $5 on the first day at work, the square of that amount on the second day, and three times the amount of the second day on the third day. how much does ron earn in three days?

The graph represents the height y, in meters, above a lake of a rock x seconds after it is thrown from a ledge. Which statement is true? Select each correct answer.

Solve for x in this equation 2 (x-8) = 14

Jean bought 7 packages of sandwich meat. Each package weighs 2/3 pound.

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.