kody69372
kody69372 kody69372
  • 13-09-2019
  • Mathematics
contestada

Solve the system by the substitution method.
x-2y = -2
y = - 3x + 8

Respuesta :

Аноним Аноним
  • 13-09-2019

x-2y = -2

x-2(-3x+8)=-2

mutiply the bracket by -2

(-2)(-3x)=6x

(-2)(8)=-16

x+6x-16=-2

7x-16=-2

move -16 to the other side

sign changes from -16 to +16

7x-16+16=-2+16

7x= -2+16

7x= 14

divide both sides by 7

7x/7=14/7

x=2

Find y by using the substitution method

y=-3x+8

y=-3(2)+8

-6+8

=2

Answer:(2,2)

Answer Link

Otras preguntas

Which inequality does this graph represent? –1 < x –1 Less-than-or-equal-to x x < –1 x Less-than-or-equal-to –1
what’s the central angle??
Which statement is true regarding the graphed functions?
Determine if the following triangle is a right triangle or not using the Pythagorean theorem converse. Triangle with side lengths:8 in,15 in and 17 in A.true,th
help help help help help help​
Which of the following is an example of a primary source? A. A dictionary definition of a science term B. An article written by a scientist C. A textbook writte
Convert 120 degrees F to K. [?]K
Find the gradient of the line l1 which has equation 4x-3y+5=0 .
When will an object sink in water, according to Archimedes' principle? A. When its weight is greater than the weight of water it displaces B. When its density i
This communication channel is typically used to provide an audience with information about a product or service, usually for informational or persuasive purpose