Answer:
La persona está a 5 kilómetros con respecto al punto de partida.
Step-by-step explanation:
Considérese que la dirección norte coincide con el semieje +y y que la dirección este coincide con el semieje +x. A continuación, obtenemos las formas vectoriales equivalentes de cada afirmación:
(i) Una persona camina 7 kilómetros hacia el norte:
![\vec r_{1} = 7\,\hat{j}\,[km]](https://tex.z-dn.net/?f=%5Cvec%20r_%7B1%7D%20%3D%207%5C%2C%5Chat%7Bj%7D%5C%2C%5Bkm%5D)
(ii) Después 3 kilómetros hacia el este:
![\vec r_{2} = 3\,\hat{i}\,[km]](https://tex.z-dn.net/?f=%5Cvec%20r_%7B2%7D%20%3D%203%5C%2C%5Chat%7Bi%7D%5C%2C%5Bkm%5D)
(iii) Y luego, 3 kilómetros hacia el sur:
![\vec r_{3} = -3\,\hat{j}\,[km]](https://tex.z-dn.net/?f=%5Cvec%20r_%7B3%7D%20%3D%20-3%5C%2C%5Chat%7Bj%7D%5C%2C%5Bkm%5D)
El vector resultante de desplazamiento se construye a partir de la siguiente suma de vectores:
(1)
![\vec R = 3\,\hat{i} + 4\,\hat{j}\,[km]](https://tex.z-dn.net/?f=%5Cvec%20R%20%3D%203%5C%2C%5Chat%7Bi%7D%20%2B%204%5C%2C%5Chat%7Bj%7D%5C%2C%5Bkm%5D)
Asumiendo que la distancia coincide con el desplazamiento resultante, calculamos la distancia con respecto al punto de partida mediante el Teorema de Pitágoras:
La persona está a 5 kilómetros con respecto al punto de partida.
Answer:
d
Step-by-step explanation:
cannot be a or c cause it has a negative sign in front of it causing it to reflect over y axis. Cannot be B cause it doesn't have two coefficients with X. I also graphed it.
Answer:y = -3x + 10
Step-by-step explanation:
To find an equation of a line that passes through two points, we have to first find the slope between the two equation. We can do this by using the slope formula:
where (x₁, y₁) and (x₂, y₂) are the two points that we are finding the slope between.
Lets make (x₁, y₁) equal to (0, 10) and (x₂, y₂) equal to (3, 1). Now we plug them into the slope formula:
So the slope between the two points is -3.
From here, I would normally take one of the points given to us and plug in the point and slope into the point-slope form of a line and then simplify until we get it in slope-intercept form. But if you look carefully, the y-intercept is given to us as the point (0, 10). So we now know that the y-intercept of the line is 10. We can now take the y-intercept and the slope and plug it into the slope-intercept form of a line to get out equation:
y = mx + b
plug in -3 for m (the slope) and 10 for b (the y-intercept)
y = -3x + 10
So now we have our equation.
I hope you find my answer and explanation helpful. Happy studying. :)
Answer:
Tangent = opposite / adjacent
Tangent of 45º equals 1
Step-by-step explanation:
