Simplifying algebraic expressions

-8-4m-4m-8 + - 3+10m

What is 3 divided by 88

Which two parallelograms have congruent diagonal bisectors

Can someone solve these two equations 2/8=3/r and the next problem is 2/5=9m/8 these are two different problems

When rounded to the nearest tenth, a puppy has the weight of 8.1 pounds. which of these could be the actual weight in pounds?

Sebastian swam laps every day in the community swimming pool. He swam 45 minutes each day, 5 days a week, for 12 weeks. In that time, he swam 1,800 laps. What was his average rate in laps per hour?

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.