What to do when the says of in a problem

Michaela wrote the following. If p + 9 = 25 and p = q, then q + 9 = 25. Which property did Michaela show? A) symmetric property of equality B) multiplication property of equality C) substitution property of equality D) reflexive property of equality

Witch property is used to simplify 3 C + 9 + 4 C equals 3 C + 4 C + 9

How to find the mode of a set of numbers?

An object that is translated 5 units to the right would be written as y + 5. True False

If g (x) = x^2+2, find g (3)

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.