duh8 duh8
  • 07-02-2017
  • Mathematics
contestada

Solve 3x + 5y= 27.5
2x +3y =16
By elimination. What is the solution?

Respuesta :

surjithayer surjithayer
  • 09-02-2017
3x+5y=27.5  ...(1)
2x+3y=16  ...(2)
multiply (1)by 2 and (2)by 3
6x+10y=55  ...(3)
6x+9y=48   ...(4)
subtract (4) from (3)
6x+10y-6x-9y=55-48
y=7
from (2)
2x+3(7)=16
2x=16-21
2x=-5
x=-5/2=-2.5

Answer Link

Otras preguntas

a human factor expert recommends that there be at least 9 square feet of floor space in a college classroom for every student in the class. find the minimum flo
a chess player played 20 games total. if he won 2 of the games, what is the ratio of games he lost to games he won?
two increased by six times a number
how to write a multiplication equation with 1/2 as a factor. explain. (picture of 8 halved apples)
what are the various ways in which lithospheric plates interact with each other as they move around on a dynamic earth??
how to write a multiplication equation with 1/2 as a factor. explain. (picture of 8 halved apples)
Write an inequality for each situation There are at least 24 pictures on the roll of film.
Which number is larger, .8 or .1?
what is the  answer 3xy+13xy-12xy=
Jane needs to miss fewer than 1/6 of the words on her spelling list.  If there are 18 words, how many can she miss?  Explain.