01067416q
01067416q 01067416q
  • 03-12-2016
  • Mathematics
contestada

I really need help and no one will help..!

solve each system by substitution. explain step by step

r + s = -12
4r - 6s = 12

Respuesta :

apologiabiology
apologiabiology apologiabiology
  • 03-12-2016
divide 2nd equation by 2
2r-3s=6

mltiply first equation by -2 and add to first

-2r-2s=24
2r-3s=6 +
0r-5s=30

-5s=30
divide by -5
s=-6

sub back
r+s=-12
r-6=-12
add 6
r=-6

r=-6
s=-6
Answer Link

Otras preguntas

what is the meaning of these idioms: stuck between a rock and a hard place and achille's heel.
The process of generating an electric current by moving an electrical conductor relative to a magnetic field is called
ABCD Is a rhombus .AC=8cm and BD=3.5 cm .what is the aera of the rhombus
find the average 89,40,18
which is the primary consumer in this food chain?
List three components of good sportsmanship and apply them to a competition
what is the need to classify organisms
Which of the following is NOT an example of an extreme cirumstance in which it's useful to be an aggressive communicator? A. emergency situation B. on-the-spot
What was the cause of the Great Schism of 1054 between the Eastern and Western Church? a. It was a gradual process of estrangement between the east and the west
Administered prices inflation