David's bowling score is 1 less than 3 times Aaron's score. The sum of their scores is 199. Find the score of each student. Use the variable a for Aaron's score.

Atrucker had a load of grain containing 2 tons. she unloaded 1 ton and 1,200 pounds at the warehouse. how much grain does she still have left on the truck?

Which of these triangle pairs can be mapped to each other using two reflections?

Atorch and a battery cost 2.50 altogether. the torch costs 1.50 more than the battery. what fraction of the total price is the torch? give your answer in its simplest form.