jtaylor7584 jtaylor7584
  • 07-03-2018
  • Mathematics
contestada

solve the system by either elimination or substitution
3x-5y=21
2x+y=1
A.2,-3
B.2,3
C.-2,-1
D.-2,1
My guess is c

Respuesta :

W0lf93
W0lf93 W0lf93
  • 13-03-2018
The correct answer is A: x=2 and y=-3. Either method would work, but for example, let's use elimination. If you multiply the second equation by 5, you get: 10x +5y = 5. When you add both equations, you can then cross out both y terms. You are left with one equation that reads: 13x=26. Solving for x gives you 2. You can substitute 2 in for x in either equation and you will receive -3 for your y value.
Answer Link

Otras preguntas

What pictures did the author leave in your mind? (Tell-Tale Heart)
the articles of confederation created a government with how many branches
explain the term DNS and why is it used
What unit(s) is used to measure cell size?
Does the saying “Actions speak louder than words” talks about criticism or about being a critic?
In Hinduism, what does "saddled with the past" mean?
punctuation mark for what a great day
what three mathematical words can you use to describe a square
Why was the civil service system reorganized in the late 1800s? A)two new agencies were created: The office of personnel management and merit system protection
What happens to the population growth in a logistic growth pattern as it approaches carrying capacity? A. speeds up B. slows down C. remains constant