Cuantas combinaciones de 5 cifras se pueden hacer con los sig numeros 1,2,3,4,5

Which is the equation of an ellipse with directrices at x = ±4 and foci at (2, 0) and (−2, 0)?

Nick has box brads. he uses 4 brads for the first project. nick let’s b represent the original number of brads and finds that for the second project, the number of brads he uses is 8 more than half the difference of b and 4. write an expression to represent the number of brads he uses for the second project.

Through non-collinear points there is exactly one plane.