Model and regroup to find the difference

A 1400 kg car moving + 13.7 m/s makes an elastic collision with a 3200 kg truck, initially at rest. What is the velocity of the car after the collision?

Tom began a savings account with $120 He added money each mon month after the initial deposit. The amount can be represented by the equation y=65x + 120, where x is the number of months. What is number 65 in this equation? A.

Lisa find a hat that is already marked downtime price tag shows that the original price was $36.00 the marked down price is $27.00 what percent has that hat been marked down

Simply the expression. 3x + 4y + 2 + 6y + 3

Find the difference. 5wx - 2wx

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.