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EleoNora [17]
4 years ago
11

Solve the system of equations.

Mathematics
2 answers:
Kipish [7]4 years ago
7 0
2x - 5y = 3
x - 3y = 1...multiply by -2
---------------
2x - 5y = 3
-2x + 6y = -2 (result of multiplying by -2)
--------------add
y = 1

x - 3y = 1
x - 3(1) = 1
x - 3 = 1
x = 1 + 3
x = 4

solution is (4,1)
BartSMP [9]4 years ago
6 0

Answer: First Option is correct.

Step-by-step explanation:

Since we have given that

2x-5y = 3\\\\ x -3y = 1

Now, we will use "Substitution Method" to find the values of x and y:

x=1+3y\ -(3)

Put the value of x in first equation i.e.

2x-5y = 3

2(1+3y)-5y=3\\\\2+6y-5y=3\\\\2+y=3\\\\y=3-2\\\\y=1

Now, we use the value of y in equation (3),

x=1+3y\\\\x=1+3\times1\\\\x=1+3\\\\x=4

Hence, values of (x,y) is (4,1).

Therefore, First Option is correct.

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Ayuda es para mañana El estudiante 1 y el estudiante 2 están a 53 metros, uno del otro. El estudiante 1, desde su posición, ve u
hram777 [196]

Answer:

La opción correcta es;

Estudiante 2, ya que está aproximadamente a 32,39 metros de distancia

Step-by-step explanation:

Los parámetros dados son;

La distancia entre los dos estudiantes = 53 metros

El ángulo medido entre la línea del Estudiante 1 a la caja fuerte y el Estudiante 1 y el Estudiante 2 = 37 °

El ángulo medido entre la línea del Estudiante 2 a la caja fuerte y el Estudiante 2 y el Estudiante 1 = 43 °

Dado que los dos estudiantes y la caja fuerte forman los vértices de un triángulo, tenemos;

Sea θ el ángulo del triángulo opuesto a la distancia entre los dos estudiantes

Por lo tanto;

θ + 43 ° + 37 ° = 180 ° (teorema de suma de ángulos)

θ = 180 ° - (43 ° + 37 °) = 100 °

Por regla del seno, tenemos;

a / (sin (A) = b / sin (B)

Por lo tanto;

53 / (sin (100 °)) = b / (sin (37 °)) = c / (sin (43 °))

Lo que da;

b = (sin (37 °)) × 53 / (sin (100 °)) = 32,39 metros

c = (sin (43 grados)) × 53 / (sin (100 grados)) = 36,7 metros

Por lo tanto, el Estudiante 2 está más cerca, ya que está aproximadamente a 32,39 metros de distancia.

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3 years ago
A number increased by 7 is 2 less than twice the number
erastovalidia [21]

The answer is 9

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Hope this helped!

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Use undetermined coefficients to find the particular solution to 7t + 5=y''+y'-4y У, (t) - Preview Get help: Video Points possib
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Suppose y_p=a_0+a_1t is a solution to the ODE. Then {y_p}'=a_1 and {y_p}''=0, and substituting these into the ODE gives

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Answer:

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