It says write 2 equations what should I do?

What is 279,000 written in scientific notation

In a large population of college-educated adults, the mean iq is 112 with standard deviation 25. suppose 300 adults from this population are randomly selected for a market research campaign.

9/10 subtract 6/10 equals

Perform the indicated operation. 14 - (-10)

Which unit of measure would you use to weigh your bike?

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.