What is the thing called that holds water in a desert?

Find the center and the radius of the circle with the equation: x^-2x+y^2+4y+1=0

Read the excerpt below and answer the question.i ask, gentlemen, sir, what means this martial array, if its purpose be not to force us to submission? in this excerpt from his famous virginia convention speech, patrick henry employs which literary device? questiondeclarative statement

We will be learning about animals that live in the arctic. your assignment is to find information about one animal in the arctic. be sure that you find the following information about the animal: average height and weight, appearance, diet, shelter, mating habits, and any other interesting or important facts. we will use the information that you gather in the research with an in-class project. be sure to keep track of your sources; your final project will require a works cited page. in an internet search engine, which group of keywords is most appropriate for this assignment? a) project, arctic, diet b) arctic, animals, facts c) cold, appearance, animals d) average height and weight, one animal