1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Nitella [24]
3 years ago
15

4x-y=2 2x+9y=-12 unsure how to solve

Mathematics
2 answers:
Anna11 [10]3 years ago
8 0
Simple, use the process of elimination to figure this out:

4x-y=2
2x+9y=-12

Convert these, to be able to find either x or y.

2(4x-y=2)   8x-2y=4   multiply by 2.
then
4(2x+9y=-12)  8x+36y=-48

Which makes them

8x-2y=4
-
8x+36y=-48

-38y=52

This simplified makes it y= -26/19.

Then plug y back into the original equation

4x-y=2

4x-(-26/19)=2

Making it x= 3/19.

Thus your Point of Intersection is at (3/19, -26/19)
sammy [17]3 years ago
3 0
4x-y=2 \\ 2x+9y=-12 \\ \\ ---- \\ \\ 4x - y = 2 \\ \\ 4x - y + 4 = 2 + y \\ \\ 4x = 2 + y \\ \\  \frac{4x}{4} =  \frac{2+y}{4} \\ \\ x =  \frac{2+y}{4} \\ \\ 2 \frac{2+y}{4} + 9y = -12 \\ \\ 9y +  \frac{y+2}{2} = -12 \\ \\ 2 \times 9y + 2 \frac{y+2}{2} = -2 \times 12 \\ \\ 19y + 2 = -24 \\ \\ 19y + 2 - 2 = -24 - 2 \\ \\ 19y = -26 \\ \\  \frac{19y}{19} =  \frac{-26}{19} \\ \\ y = - \frac{26}{19} \\ \\

-----

\\ \\ x =  \frac{2+y}{4} \\ \\ y = - \frac{26}{19} \\ \\ x =  \frac{2- \frac{26}{19} }{4} \\ \\ x =  \frac{3}{19} \\ \\

-----

The final result is: x = 3/19 and y = -26/19.
You might be interested in
CosX sec^2X tanX - cosX tan^3X = sinX
ch4aika [34]
\cos x\sec^2x\tan x-\cos x\tan^3x=\cos x\tan x\left(\sec^2x-\tan^2x\right)=\sin x\left(\sec^2x-(\sec^2x-1)\right)=\sin x
4 0
3 years ago
you created a new playast, and 100 of your friendslistened to it and shared if theyliked the new or not, Nadhil said the ratio o
Dovator [93]
Dylan is wrong because if you multiply that ratio times 2 it would be 6/2 not 7/2.
6 0
3 years ago
How do I find these angle measures?
ch4aika [34]
The measure of angle 1 is 75 degrees because it is a corresponding angle with the one given of 75 degrees
the measure of angle 2 is 105 degrees because it forms a supplementary angle with the one next to it that is 75 degrees. (this means they add up to 180 degrees.
6 0
3 years ago
Read 2 more answers
Write the following phrase<br> as an<br> inequality: 3 more than twice n is at most 50.
Margarita [4]

Step-by-step explanation:

3 more than twice n = 3+2n

3 more than twice n is atmost 50,

=> 3+2n <= 50 {(3+2n) is less than or equal to 50}

7 0
3 years ago
Read 2 more answers
Find what percent 14 is of 23 to the nearest whole percent?
Kazeer [188]
14 is .608, roundedto the nearest percent 14 is 61% of 23
4 0
3 years ago
Other questions:
  • Y=-2x + 2 make a table of values​
    10·1 answer
  • Find the area of an equilateral triangle with a side of 6 inches
    9·2 answers
  • Kendra has a math test every 12 school days and a vocabulary test every 9 school days. She had both a math test and a vocabulary
    15·2 answers
  • Im stuck on this one
    11·1 answer
  • Need help I don't get it. Which point is an exact solution to the system y = -6(0.75)^x and y = 4(x - 1)?
    13·1 answer
  • The lines shown below are parallel. If the green line has a slope of 5, what is the slope of the red line?
    12·2 answers
  • (-5)(-5)(-5)(-5)(-5)(-5)(-5)(6)(6)(6)
    5·2 answers
  • If you were to use the substitution method to solve the following system, choose the new equation after the expression equivalen
    13·1 answer
  • HELPPP PLS<br> show work
    12·1 answer
  • 50 POINTS .....................
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!