behappy0217
behappy0217 behappy0217
  • 22-10-2017
  • Mathematics
contestada

HELP PLEASE
Solve the system by substitution
-4.5x - 2y = -12.5
3.25x - y = -0.75

Respuesta :

daijingyi722
daijingyi722 daijingyi722
  • 22-10-2017
from the second equation ,we can know that y=3.25x+0.75
plug it into the first equation
-4.5x-2(3.25x+0.75)=-12.5
-4.5x-6.5x-1.5=-12.5
-11x=-11
x=1
plug it back into the second equation, y=3.25x+0.75=4
the answer would be (1,4)
Answer Link
krissy24 krissy24
  • 22-10-2017
You can also go on mathwey it would solve it fast
Answer Link

Otras preguntas

Write the expression in factored form. 3m-6n 12x-18y 6x-18
A dragster in a race accelerated from stop to 60 m/s by the time it reached the finish line. The dragster moved in a straight line and traveled from the startin
the law of {blank} of matter states that matter can neither be created nor destroyed
a giraffe can run up to 46.93 feet per second. how far can a giraffe run in 1.8 seconds. justify your answer
What were the positive and negative effects of rule by feudal lords
Both 2 and 5 are common factors of a number. The number is between 101 and 118. What is the number? Give a reason for your answer.
-18-6k=6(1+3k)...what is the value of k
What is 75% of 18 I'm really confused on this lesson
whats 4x-7=29(to make x the subject)
Explain why the growing of willow for biofuel is an example of sustainable development.