PLS HELP ASAP (no links) Harold takes his dog to a veterinarian every year for a check-up. Last year, the difference in the dog's weight from the year before was-2 pounds. This
year, the difference in its weight from last year is 3 pounds. What is the difference in the dog's weight from 2 years ago?

Is a currency whose value is tied to another currency, meaning that the exchange is fixed

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.

72 the length of a side of a triangle is 36. a line parallel to that side divides the triangle into two parts of equal area. find the length of the segment determined by the points of intersection between the line and the other two sides of the triangle.