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
Hatshy [7]
3 years ago
13

Solve each system by elimination.

Mathematics
1 answer:
Murrr4er [49]3 years ago
3 0

Answer:

3) x = -4 and y = 6

4) x = -1 and y = 0

5) x = 1 and y = -3

6) x = -4 and y = -3

Step-by-step explanation:

3) Add the equations:

(3x + 4y = 12) + (-3x - y = 6) (eliminate the x)

= 3y = 18

y = 18/3

y = 6

3x + 4(6) = 12

3x = 12 - 24

x = -12/3 = 4

4) Add the equations:

(-5x - 6y = 5) + (-6x + 6y = 6)

-11x = 11

x = -1

-5(-1) -6y = 5

-6y = 5 - 5

y = 0

5) 7x -4y = 19

10x - 2y = 16

Multiply the second equation by -2 to eliminate the y and add both equations.

-2(10x -2y = 16) =

(-20x + 4y = -32) + (7x - 4y = 19)

-13x = -13

x = 1

7(1) - 4y = 19

-4y = 19-7

y = 12/-4

y = 3

6) multiply the second equation by -2 to eliminate the x and then add the equations.

-2(5x - 3y = - 11) =

(-10x + 6y = 22) + (10x - 9y = - 13)

= -3y = 9

y = - 3

10x - 9(-3) = - 13

10x = -13 - 27

x = -40/10

x = -4

You might be interested in
Which statement is true?
spayn [35]

I’m not sure is D , I’m clueless

8 0
3 years ago
Read 2 more answers
Which of the following sets of lengths could not be the side lengths of a triangle?
docker41 [41]
To find out if the three side lengths can create a triangle, the three smaller lengths must be greater than the longer length.

\bf~Option~A

\sf~3~meters,5~meters,7~meters

\sf3+5=8>7

So this can create a triangle.

\bf~Option~B

\sf1~yard,1.25~yards,1.5~yards

\sf1+1.25=2.25>1.5

So this can create a triangle.

\bf~Option~C

\sf5~inches,10.5~inches,17~inches

\boxed{\sf5+10.5=15.5

So this cannot create a triangle.

\bf~Option~D

\sf15~millimeters,18~millimeters,30~millimeters

\sf15+18=33>30

So this can create a triangle.

Therefore, your answer is Option C.
8 0
3 years ago
Ellie is an African elephant. When she was born, she weighed about 200 pounds. As an adult, she weighs 7 tons! How many pounds d
wariber [46]

Answer:

13,800 pounds

Step-by-step explanation:

one ton = 2000 pounds

7 tons = 14,000 pounds

14,000 - 200 = 13,800 pounds

5 0
2 years ago
A number that has a whole number part and a fraction part is a
Vsevolod [243]

it would be known as a mixed fraction....?


4 0
3 years ago
Read 2 more answers
You are attempting to make a scale drawing of your room. The actual size of your room is 12 feet
olga2289 [7]

Answer:

width = 8 inches

length = 10 inches

Step-by-step explanation:

width= 12/1.5

= 8

length = 15/1.5

= 10

6 0
3 years ago
Other questions:
  • Shelby needs three different colors of pens to organize her daily planner if she has 12 pints to choose from how many ways can s
    10·2 answers
  • The volume of a cylinder is
    11·2 answers
  • What is the value of 2x + 11y when x = 4 and y = 2?
    8·2 answers
  • solomon yearly income is $49827 what is his yearly income when it is rounded off to the nearest hundred dollars ?
    14·2 answers
  • **WILL MARK BRAINLIEST AND THANK YOU**
    12·1 answer
  • What is the perimeter of the room?<br>5 yd<br>. What is the area of the room?<br>4 yd​
    9·1 answer
  • What is a good website to get answer to a CA on a computer
    11·1 answer
  • Yo can someone help me out
    6·1 answer
  • I need help i will give branly to eny one that anserwes it corecctly
    12·2 answers
  • Solve the system by substitution.<br> y = 3x<br> y = -4x – 49
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!