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

What is the value of p in the equation x2 = 12y?

What emotion can we assume Macbeth is feeling, based on his vision of Banquo's ghost? A.Pride B.Confidence C.Anger D.Guilt

A token economy incorporates _____ to modify behaviors by reinforcing desired behaviors with tokens that can be exchanged for various treats.

If you skip the warm-up, you create a greater _____. A. oxygen debt B. EPOC C. heart rate D. calorie burning potential

The metal in a penny is worth about 0.505 cents. How many cents is this written as a fraction in simplest form? 0.505 cents

Hay _______________ (2,700) estudiantes en mi escuela.

The polynomial x3 + 8 is equal to (x + 2)(x2 – 2x + 4). (x – 2)(x2 + 2x + 4). (x + 2)(x2 – 2x + 8). (x – 2)(x2 + 2x + 8)

how do i solve this problem?

What are contradictory goals and competing expectations of american criminal justice?

Is there word meaning "Laughing at oneself?"