kayleyswanson2004
kayleyswanson2004 kayleyswanson2004
  • 26-01-2020
  • Mathematics
contestada

4 math problem

1. y=-6x-14
-x-3y=-9

2. -5x+2y=-11
5x-3y=14


3. x+10y=-16
x-6y=16


4. -12x-y=15
6x-2y=-30




please help



Respuesta :

devishri1977
devishri1977 devishri1977
  • 26-01-2020

Answer:

Step-by-step explanation:

1)y=-6x-14   ---------(i)

-x-3y=-9  ---------- (ii)

Substitution method:

Substitute y  value in equ (i)

-x -3*(-6x-14) = -9

-x - 3*-6x -3*(-14)= -9

-x + 18x + 42 = -9

17x = -9 -42

17x = -51

x = -51/17

x = -3

Substitute x value in equation (i)

y = -6*-3 -14

y =18-14

y = 4

Answer Link
PieJee PieJee
  • 26-01-2020

Step-by-step explanation:

I'm using substitute in the first and something I don't know the name of in the rest.

Ver imagen PieJee
Answer Link

Otras preguntas

Find the Surface of the prism 4in 10 in and 18in
The figure is the net for a rectangular prism. What is the surface area of the rectangular prism represented by the net? Enter your answer in the box.
What is the purpose of this document? to end racial discrimination and segregation in un countries to describe the characteristics of apartheid to condemn south
Which statement best explains how the pacing in this passage helps reveal squealer’s character? the quickening pace builds suspense about squealer’s next course
in hidden figures how is nasa significant in texas history
please help me with this question i will mark as brainliest, thank you!
1/2(x - 4) = 5 Thank you!
A sum of 300 pounds into the ratio of 1:2:2. How much is the smallest share?
assess how substance abuse may affect learners academic performance​
x + 3y=9 x + y = 21 Solve it algebraically