In the following expression which terms can be combined?

3w + 5y - 6 + 7y

1.3w + 5y

2.5y + 7y

3. 5y - 6

4. - 6 + 7y

Torri had 20$ to buy a birthday present for her dad. She decided to buy a DVD for 18$. The sales tax was 7%. Does she have enough money? Explain your reasoning.

find the area of each semi circle. round to the nearest tenth (1 decimal place) use 3.14 for pi. 12 inches is the radius

Solve the equation. check the solution. - 2/x+4=4/x+3

Colin and Dan are marking exam papers. Each set takes Colin 20 minutes and Dan 1 hour. Express the times Colin and Dan take as a ratio. Give your answer in its simplest form.

Solve the problem for x - 3 - (-8) - (-2) = x

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.