Determine which families of grid curves have u constant and which have v constant. u constant each grid curve is a helix each grid curve is a vertically oriented circle each grid curve lies in a plane z = ky that includes the x-axis each grid curve is a circle of radius (1 − |u|) in the horizontal plane z = u each grid curve is a circle of radius |u| in the horizontal plane z = sin(u) the grid curves lie in the vertical plane y = (tan3(u))x

How do you use the elimination method for this question? explain, because i really want to understand!

Find the cosine function that is represented in the graph.

Dexter read 11 science fiction books and 5 history books. lena read 9 science fiction books and 4 history books. compare the students’ ratios of science fiction books to history books. 1. determine the ratios’ form:    science fiction books to history books 2. write the ratios as fractions:    dexter: 115; lena: 94 3. rewrite with a common denominator. 4. compare. 5. answer the question. determine which shows the correct comparison of the ratios for this problem.