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
Murrr4er [49]
3 years ago
11

How to do I do solving systems of equations by elimination

Mathematics
1 answer:
Andre45 [30]3 years ago
7 0
If you have two equations, you will multiply one of them so it cancels out the other one. For Example, 2x-y=16        3x-y=28You will multiply the second equation by -1 which brings us to 2x-y=16    -3x+y=-28you will add both equations together which will leave you with-x=-12x=12Then, you plug that in. 2x12=24.    24-16=8.    3x12=36     36-8=28    And, You're done!
You might be interested in
Y=2x <br> y=4x+2 <br><br> i need help solving this it’s the substitution method
PilotLPTM [1.2K]

Answer:

X=-1,y=-2

Step-by-step explanation:

if y =2x

2x=4x+2

so X=-1 and y=-2

4 0
3 years ago
What does f(-1) =_<br> and x=_ ?
lubasha [3.4K]

Answer:

F(-1) = 1

x = 3

Step-by-step explanation:

1) Assume that f(-1) = y1

So that point A (x1 = -1; y1) is a point lying in the graph representing the equation y = f(x)

As it can be seen in the figure, the graph representing that equation crosses point (-1; 1)

=> Point A has y1 = 1

=> f (-1) =1

2) Assume that f(x2) = -2

So that point B (x2; y2 = -2) is a point on the graphy representing the equation y = f(x)

As indicated in the figure, the graph crosses point (3; -2)

=> Point B has x2 = 3

=> When f(x) = -2, x = 3

5 0
3 years ago
Solve for d.<br> -4d + 7 = 3d
STALIN [3.7K]

Step-by-step explanation:

The Answer Is

-4d + 7 = 3d

So, 7 = 3d + 4d

Then, 7 = 7d

•d = 7/7

= 1

So D = 1.

4 0
3 years ago
Can one fifth be simplified
Svetradugi [14.3K]
No, and never, cus there ain't any numbers that are greater than 1 that can go into both of them.
<span>so basically if the numerator is 1, you can't simplify it anymore. Is Impossible.</span><span />
3 0
3 years ago
Matters has 456:8 What s his rate
Olegator [25]

We are given ratio 456:8.

The given ratio can be written in fraction form as \frac{456}{8}

In order to find the rate, we need to divide 456 by 8, because it would give the unit value.

When we divide 456 by 8, we first take multiple of 8 closer to the number 45.

8*6=48 but it's greater than 45, so we would take 8*5 =40.

Subtracting 40 from 45, we get 5.

Getting 6 down, we get 56. Take multiple of 8 upto 56.

8*7= 56.

56 -56=0.

So, on dividing 456 by 8 we got 57.

Therefore, rate is 57 per unit.


3 0
3 years ago
Other questions:
  • A building engineer analyzes a concrete column with a circular cross section. The circumference of the column is 18 \pi18π18, pi
    7·1 answer
  • PLEASE HELP ASAP!!!!!!!! WILL GIVE BRAINLIEST IF YOURE RIGHT!!
    9·1 answer
  • Help,..............................
    14·1 answer
  • Can you help me with this question? You get 20 points if it is correct OLNY.
    8·2 answers
  • GEOMETRY. PLEASE INCLUDE CLEAR ANSWER AND EXPLANATION
    11·1 answer
  • Please please help i don’t understand this.
    6·1 answer
  • Write an equation of the line that passes the points (-9,2) and is perpendicular to the line y=3x-12
    10·1 answer
  • Please answer this correctly
    15·1 answer
  • Please help me with this!
    12·1 answer
  • Help, please. This is related to mirror and shadow problems
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!