kobedelatorre
kobedelatorre kobedelatorre
  • 24-09-2020
  • Mathematics
contestada

what is the solution to this system?
3x+2y=45
4x+-y=5

Respuesta :

cromulent
cromulent cromulent
  • 25-09-2020

(I) [tex]3x + 2y = 45[/tex]

(II) [tex]4x - y = 5[/tex]

Get [tex]y[/tex] alone in equation (II)

[tex]4x - y = 5\\y = 4x - 5[/tex]

Insert new equation (II) in equation (I)

[tex]3x + 2(4x - 5) = 45\\3x + 8x - 10 = 45\\3x + 8x = 45 + 10\\11x = 55\\x = 5[/tex]

Insert [tex]x = 5[/tex] in equation (II)

[tex]y = 4 \cdot 5 - 5\\y = 20 - 5\\y = 15[/tex]

Answer Link

Otras preguntas

x² - 16√x = 12 ise ; x-2√x kaçtır ?
What was the goal of the National Origins Act of 1924? A. To increase immigration from Asia B. To limit all immigration C. To increase immigration from Asia D
Four students are working on a human body project for their science class. They cannot agree on the basic unit of structure and function in the human body where
BUSCO NOVIA TENGO 16
5* Le terrain de M. Campo mesure 1250 m². C'est 450 m² de plus que celui de M. Vergne. Quelle est la superficie du terrain de M. Vergne ?
the Earth is on average 150 million km from the sun calculate its average speed in orbit?​
Select the correct answer. When will the Social Security fund dry up at its current level? O A. 2022 • B. 2027 C. 2037 O D. 2097 O E. 2117
How do you convert this equation into vertex form?
secondly,let me intoduce the name of this course.And ......... have luck,you to
The parent function of the function g(x)=(x-h)² + kis f(x)=2. The vertex of the function g(x) is located at (9.- 8). What are the values of h and k? g(x)=(x-__