vanessaaa9
vanessaaa9 vanessaaa9
  • 06-12-2017
  • Mathematics
contestada

What are the solutions of the following system x2+y2=25 , 2x+y=-5

Respuesta :

lesliekolleroxrkcf
lesliekolleroxrkcf lesliekolleroxrkcf
  • 06-12-2017
y=5-2x
x^2 + (5-2x)^2 = 25

x^2 + 25-20x+4x^2 = 25

x^2 +4x^2-20x+25=25
5x^2 -20x=0

x=0 and y=5
Answer Link
curtiskuefler
curtiskuefler curtiskuefler
  • 14-09-2018

x^2+y^2=25

2x+y=-5

(0, -5) plug into equation 1 and 2 but you have to find what second ordered pair fills in for x^2+y^2=25 which would be (-4, 3). Reasoning is that-

-4^2=16 and 3^2=9 so 16+9=25

The Correct answer is C (0, -5) and (-4, 3)

Answer Link

Otras preguntas

please help 1. find 15% of 120 2. what percent of 72 is 68.4 3. 12.5 is 8% of what number? 4. 48 is 40% of what number 5. what number is 62.5% of 195
True or false? Content marketing is a relatively new practice that became popular in the 1950’s with the boom of advertising firms.
which lens have plus power ​
Please help I’ll mark brainliest please!!!!!
The platypus has venom-producing glands, which are rare among mammals, but its venom is not generally lethal to humans.
9 is twice larger than 3 or 9 is three times larger than 3?
Whats 2x36 PLEASE HELP ILL GIVE BRAINLYEST
what are the different levels of community participation?​
Escribe oraciones en el presente que usen por y la palabra o frase apropiada de la lista mi amigo / mandar mensajes / …
Which of the following are true? 1. You don't have to visit the library to do research if you have access to the Internet II. Used in conjunction with the libra