An animal shelter spends $5.50 per day to care for each bird and $7.50 per day to care for each cat. Daniel noticed that the shelter spent $50.00 caring for birds and cats on Wednesday. Daniel found a record showing that there were a total of 8 birds and cats on Wednesday. How many birds were at the shelter on Wednesday?

Aline has a slope of 1/4 and passes through point (0.4,-1/2). what is the value of the y-intercept?

The perimeter of a triangle is 69 cm. the first is 5 cm shorter than the second side. the third side is twice as long the first side. find the length of each side

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.