Jason and jerry are competing at a weightlifting competition. they are both lifting barbells containing 200 pounds of plates. jasons barbell has four large and 10 small plates on it jerry's barbell has six large and five small plates on it. how much does each large play and each small plate weigh. (use systems of equasions to solve)

Four individuals pool money together to start a new business and agree to split the profits equally. n invests $6,000, x invests $2,000, y invests $8,000 and z invests $4,000. if the profits for the first month were $100,000, y receives than if the profits were divided in proportion to how much they invested.

Ascientist wants to use a model to present the results of his detailed scientific investigation. why would a model be useful? a )because the model makes the concepts easier to understand b) because the model is easy to put together and to use c) because the model prevents other scientists from asking questions d) because the model requires the audience to pay full attention to it i don't know what to choose because between a and d a is much more likely than d because it only wants to get the attention of the audience. i'm confuse.

There are 45 questions on your math exam. you answered 810 of them correctly. how many questions did you answer correctly?