Distributive proeprty
a(b+c)=ab+ac
3(x+7)=3x+21
Answer:
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Step-by-step explanation:
The zeros of a quadratic equation are equal to the x-intercepts of its graph. In other words, you must find the x-value that causes the expression to equal zero. Start by adding 4 to both sides of the equation:
X² - 5x + 4 = 0
Factor the equation:
(x - 1)(x - 4) = 0
Now calculate each piece separately, starting with the first one:
x - 1 = 0
Add 1 to both sides of the equation:
x = 1
We have proven that x = 1. Now calculate the second piece:
x - 4 = 0
Add 4 to both sides of the equation:
x = 4
We have proven that x = 4. Consequently, we have proven that (x = 1) and (x = 4) are the two zeros of this quadratic equation.
I hope this helps!
La distancia entre el barco y la base del acantilado es 291.61 metros.
<h3>
¿Como calcular la distancia?</h3>
Podemos pensar en esta situacion como en un triangulo rectangulo. Uno de los catetos mide 687 metros, que es la altura del acantilado.
Y conocemos el angulo al que ese cateto es adjacente, que mide 23 grados.
La distancia entre la base del acantilado y el barco será el otro cateto del triangulo rectangulo.
Entonces podemos usar la relación:
tan(a) = (cateto opuesto)/(cateto adjacente)
Reemplazando lo que sabemos:
tan(23°) = D/687m
tan(23°)*687m = D = 291.61m
La distancia entre el barco y la base del acantilado es 291.61 metros.
Sí quieres aprender más sobre triangulos rectangulos:
brainly.com/question/2217700
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Answer:
y=20 cuz the x is 0 so there for its y
