Round to the nearest 10 and hundred

The Cooking Club made some pies to sell at a basketball game to raise money for the new math books. The cafeteria contributed three pies to the sale. Each pie was then cut into eight pieces and sold. There were a total of 80 pieces to sell.

What's 7.06 divided by 0.353

If you were going to use the quadratic formula to solve the following equation and b=15, what number would you use as the value for the variable 'a'? -15x+22=12x^2

Give an example of a set of five positive numbers that have a median of 10 and whose mean is larger than ten?

John drives to the beach which is 270 miles away from his house. In 2 hours, he drives 120 miles. If he continues at that speed, how long does it take him to get to the beach

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.