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
Delvig [45]
2 years ago
6

What is the solution to the system of linear equations? y = 4x + 7 { y = 8x + 19

Mathematics
2 answers:
bekas [8.4K]2 years ago
8 0

Answer:

(- 3, - 5 )

Step-by-step explanation:

y = 4x + 7 → (1)

y = 8x + 19 → (2)

substitute y = 8x + 19 into (1)

8x + 19 = 4x + 7 ( subtract 4x from both sides )

4x + 19 = 7 ( subtract 19 from both sides )

4x = - 12 ( divide both sides by 4 )

x = - 3

substitute x = - 3 into either of the 2 equations and solve for y

substituting into (1)

y = 4(- 3) + 7 = - 12 + 7 = - 5

solution is (- 3, - 5 )

vova2212 [387]2 years ago
6 0

Answer:

(- 3, - 5 )

Step-by-step explanation:

It wont always be easy, but always try to do what ' s right!    

In a world of worriers, be the warrior!         

When nothing goes right, go left.

You might be interested in
Quotient of 120 and 10
saw5 [17]
Quotient is the result of division
120 divided by 10 = 12

therefore your quotient would be 12
5 0
3 years ago
Read 2 more answers
Please help!!
ivanzaharov [21]
Take half of the coefficient on the x term
8 0
4 years ago
Read 2 more answers
Please help me I really need to turn it in I hate khan academy
kow [346]
42.5 units sq
I’m not sure because I did this partly in my head but this should be right.
5 0
3 years ago
What is the equation of this line?
cricket20 [7]

Answer:

y=1/2x-2

Step-by-step explanation:

the line is at its y-intercept at (0,-2) letting you know that there will be a -2 after the X.

the line is going up 1 vertical box every 2 horizontal boxes letting you know that the slope is 1/2x

8 0
3 years ago
During one month, a homeowner used 500 units of electricity and 100 units of gas for a total cost of $333. The next month, 400 u
Mice21 [21]

Answer: the cost per unit of gas is $0.28

Step-by-step explanation:

Let x represent the cost per unit of electricity.

Let y represent the cost per unit of gas.

During one month, a homeowner used 500 units of electricity and 100 units of gas for a total cost of $333. This is expressed as

500x + 100y = 333 - - - -- - -- - -- -1

The next month, 400 units of electricity and 150 units of gas were used for a total cost of $286. This is expressed as

400x + 150y = 286 - - - - - - - - - --2

Multiplying equation 1 by 400 and equation 2 by 500, it becomes

200000x + 40000y = 133200

200000x + 75000y = 143000

Subtracting, it becomes

- 35000y = - 9800

y = - 9800/- 35000

y = 0.28

Substituting y = 0.28 into equation 2, it becomes

400x + 150 × 0.28 = 286

400x = 286 - 42 = 244

x = 244/400 = 0.61

7 0
3 years ago
Other questions:
  • Simplify:<br><br> <img src="https://tex.z-dn.net/?f=2y%282y%2B3yx%5E%7B2%7D%20%29-y%5E%7B2%7D%20%283-y%29" id="TexFormula1" titl
    6·1 answer
  • Point A is located at (0, -2) and is rotated 180°. What are the coordinates of point A'?
    8·2 answers
  • What is 20 times 18 1/3
    5·1 answer
  • A chessboard has 64 squares. George places 1 grain of rice on the first square, 2 grains on the second square, 4 grains on the t
    11·2 answers
  • -8=-(x+4). Please help I don't know the answer or steps to solve this equation.
    5·2 answers
  • 20 increased by twice Greg's savings<br> Use the variable g to represent Greg's savings.
    14·2 answers
  • Help with this please I beg you if you want to thank you, have a good day!!
    10·2 answers
  • Chakan worked at the warehouse after school. He earned $9.25 per hour stacking boxes. Which equation correctly relates Chakan’s
    9·1 answer
  • The phases in algebra are
    5·1 answer
  • Does the graph represent a function?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!