What is 85% of 400 horses

Use the discriminate to determine the number and the nature of the solutions of the giving equation 2x^2 + 5x+7=0

6-9x^2=-750 solve for x

A group of students are randomly placed in either a traditional AP Stat class or an online-only AP Stat class. Both classes take the same tests. On the first test, the 250 students in the traditional class got an average of 77.

Amy earns 56 dollars each week working part-time at a book store. She earn one additional dollar for each book that she sells. Let A be the amount (in dollars) that Amy earns in a week if she sells B books Write an equation relating A to B.

32 - 5x is greater than or equal to 7 - 5 (x - 5)

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.