Andrewryu13535 Andrewryu13535

10-09-2017
Mathematics

contestada

When I run up a staircase, my stride can carry me up 1, 2, or 3 steps at a time. In how many ways can I run up a 9-step staircase (given that my last stride lands me on the 9th step)?

Respuesta :

stown3333ow0yto stown3333ow0yto

10-09-2017

1+1+1+1+1+1+1+1+1
3+3+3
2+1+2+1+2+1
2+1+3+1+2

Answer Link

Otras preguntas

During Stalin’s reign, schools _____________________ to encourage support of Stalin and to revive Soviet nationalism. a. closed and reopened as military academi

the area of a rectangle is 56 square inches. the width of the rectangle is 7 in. What is the length?

This question is based on the following four sentences. 1. Netta and Jim argued over their views of free trade. 2. Netta and Jim had different views on free t

Which term identifies the cell’s ability to maintain its internal conditions? transport diffusion osmosis homeostasis

Per the 25th Amendment, when the president becomes temporarily disabled, __________. a. the vice president automatically assumes the presidency b. Congress must

Which plot element includes conflicts and challenges encountered by the characters? climax rising action resolution exposition

Which term identifies the cell’s ability to maintain its internal conditions? transport diffusion osmosis homeostasis

Hannah's mother said, Hannah is such a pencil and paper kid. its likely that Hannah will A be an arrist . B will learn to write, forming her letters perfectly.

During his election campaign in 1988, George H.W. Bush promised not to A. raise taxes. B. engage in foreign conflicts. C. cut funding for welfare programs. D

Landforms in the northwest region of the United States