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
Nesterboy [21]
4 years ago
10

-4x-2y=-12 and 4x+8y=-24 using addition/eliminatin method

Mathematics
2 answers:
ANEK [815]4 years ago
7 0
Use the elimination method:

-4x - 2y = -12
+4x + 8y = -12
--------------------
 0  + 6y = -24

6y = -24
6y/6 = -24/6
y = -4

Plug in -4 for y in one of the equations
-4x - 2y = -12
-4x - 2(-4) = -12
-4x + 8 = -12
-4x + 8 (-8) = -12 (-8)
-4x = -20
-4x/-4 = -20/-4
x = 5

x = 5, y = -4

hope this helps
Nostrana [21]4 years ago
6 0
Elimination method is best because one equation has 4x and the other has -4x. Add the two equations together.

 -4x - 2y = -12
+4x + 8y = -24
----------------------
   0 + 6y = - 36

divide by 6 both sides 
y = -6 

use this to find x in either equation.
4x + 8(-6) = -24
4x  - 48 = -24
4x = -24 + 48
4x = 24
x = 6

You might be interested in
A sum of rs 400 is lent for 3 yrs at the rate of 6% per annum. Find the interest.
Nimfa-mama [501]
Interest is equal to rs 72

Simple Interest is computed by multiplying the principal to the interest rate and the time.

I = P * r * t

Principal = rs 400
Interest rate = 6%
Term / time = 3 yrs

I = 400 * 6% * 3
I = 72   the total interest that must be paid in 3 yrs.
3 0
3 years ago
Please help!! I need the answer to the question in the picture!!!!
zloy xaker [14]

Answer:

\large\boxed{D.\ x=-2(y+3)^2-1}

Step-by-step explanation:

The equation of a horizontal parabola in the standard form:

x=a(y-k)^2+h

(h, k) - vertex

if a > 0, then open right

if a < 0, then open left

We have the vertrex (-1, -3) and the parabola is open left (a < 0).

Therefore the equation of a given parabola could be:

x=-2(y-(-3))^2+(-1)=-2(y+3)^2-1

8 0
3 years ago
HELLOOOOOO EVERYONE<br><br> HELP MEEEEE PLSSSSSS
IgorLugansk [536]
It is called the X cordinate
(X,Y)
8 0
3 years ago
Read 2 more answers
A cone has a diameter of 24 in. and a slant height of 15 in. What is the approximate volume of the cone? Use 3.14 to approximate
g100num [7]
So you are using Volume...

V=1/3(pi)r^2h
as you go thu this equation

15 x 15 =225
12 x12= 144
225-144= 81
81/9=9

which your piece would be 1/3 pi r^2h answer is 1356.48
and you round it to the nearest tenth. So

 ( 1356.5) is ur answer...... So (B)
8 0
4 years ago
Does the graph represent a function and if so, why?
hichkok12 [17]

Answer:

No

Step-by-step explanation:

Definition of a function is: a relation from a set of inputs to a set of possible outputs where each input is related to exactly one output

Here we have more than one output for one input:

  • x=-1 => y= -1, 0, 1
  • x= 1  => y= 1, 2, 3

So this is not a function

6 0
3 years ago
Other questions:
  • An experienced carpenter could build a house in 5 days. How much would he have finished if he worked for 3 days?
    6·2 answers
  • Michael and Hema are both trying to save money. Micheal starts with $55 and is saving $20 per week. Hema has $40 and is saving $
    7·1 answer
  • PLEASE HELP!
    14·1 answer
  • A transformation T: (x, y) (x + 3, y + 1). For the ordered pair (4, 3), enter its preimage point. (-1, 2) (1, 2) (7, 4)
    11·1 answer
  • Cris answered 61 out of 66 questions correctly on a test. what is his test average to the nearest thousand?
    11·1 answer
  • .61 is what percent of 20.91​
    12·2 answers
  • PLEASE HELP<br> A. 4.5<br> B. 7.5<br> C. None<br> D. 3.4<br> E. 5.9
    12·2 answers
  • Find surface area of a rectangle
    8·1 answer
  • Complete each proof​
    5·1 answer
  • Graph the line with slope 3/2 and y intercept -6
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!