mikaylafeist mikaylafeist

01-12-2016
Mathematics

contestada

Which ordered pair is the solution to the system of equations?
2x−y=−5
x+3y=22

A.(1, 7)
B.(4, 9)
C.(7, 19)
D.(8, 21)

Respuesta :

wizard123 wizard123

01-12-2016

Multiply top equation by 3

---> 6x -3y = -15
---> x + 3y = 22

Add equations together, this way the y terms will cancel themselves out.

---> 7x = 7

Solve for x

x = 7/7 = 1

Therefore the answer must be A) (1,7)

Answer Link

Otras preguntas

What is x in 30x + 7=9

Explain how "night" is a metaphor for the author, Elie Wiesel in the novel, Night.

a tree a height of 24 feet casts a shadow 8 feet long on the ground at the same time braxton casts a 2 feet long shadow how tall is braxton

Simply 3m/9m^2-1 -1/2(3m+1)

Emily filled an empty horse trough with water. The water level, in centimeters, is proportional to time elapsed, in minutes, since she began filling the trough.

An individual erroneously believes that the onset of a certain random event is likely to happen following an event or a series of events. A) Illusion of control

3x + 8 = 2 (6x-11) - 5x

Is (2,4) a solution to this system of equations? y=6x–8 y=3x 2

how does highlighting skills and experiences make you a suitable candidate

Two random samples of 25 people were asked how many 12-ounce cans of soda they consume each week. The first sample contained both males and females, aged 12-19.