djgenesisgeronp1qozx djgenesisgeronp1qozx
  • 04-10-2018
  • Mathematics
contestada

Question 5

Solve the following system of equations by using the substitution method.
y = 6x – 11
-2x – 3y = -7

(1, 2)

(2, 1)

(-3, 1)

(2, 4)

Respuesta :

lisboa lisboa
  • 04-10-2018

answer is (2,1)

y = 6x – 11

-2x – 3y = -7

Substitute 6x - 11 for y in the second equation

-2x – 3(6x-11) = -7

-2x – 18x +33 = -7

-20x + 33 = -7

Now subtract 33 on both sides

-20x   = -7 - 33

-20x = -40 ( divide by -20 on both sides)

x= 2

We know y = 6x -11

Plug in 2 for x  and find out y

y = 6(2) -11= 12 -11 = 1

So answer is (2,1)


Answer Link

Otras preguntas

why is red onions purple
a piece of wood is 180cm long, Tom cuts it into three pieces in the ratio 2:3:4 Work out the length of the longest piece
What is 2.333333 in fraction form
Explain why the current is reduced as electrons move through a conductor.
Why was there growing involvement of the USA in Europe in the years 1945-48 ??
A certain test is worth 155 points. How many points (rounded to the nearest point) are needed to obtain a score of 65%?
Locate the gerund and identify its use.Wrestling alligators seems both foolish and dangerous.
Jonathan has been on a diet since January 2013. So far, he has been losing weight at a steady rate. Based on monthly weigh-ins, his weight, w, can be modeled by
what is perpendicular to y= 3x -9 and passes through the point (3,1)
In what respect does an atom of magnesium differ from a magnesium ion (Mg^{2+})? (A)The ion has a more stable electronic arrangement than the atom. (B)The pos