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
kirill115 [55]
3 years ago
11

60 POINTS!!!! PLEASE HELP URGENT

Mathematics
1 answer:
sammy [17]3 years ago
3 0

Using linear combination method to solve the system of equations 3x - 8y = 7  and x + 2y = -7 is (x, y) = (-3, -2)

<h3><u>Solution:</u></h3>

Given that, a system of equations are:

3x – 8y = 7 ⇒ (1) and x + 2y = - 7 ⇒ (2)

We have to solve the system of equations using linear combination method and find their solution.

Linear combination is the process of adding two algebraic equations so that one of the variables is eliminated. Addition or subtraction can be used to perform a linear combination.

Now, let us multiply equation (2) with 4 so that y coefficients will be equal numerically.

4x + 8y = -28 ⇒ (3)

Now, add (1) and (3)  

3x – 8y = 7  

4x + 8y = - 28  

----------------

7x + 0 = - 21  

7x = -21  

x = - 3  

Now, substitute "x" value in (2)

(2) ⇒ -3 + 2y = - 7  

2y = 3 – 7  

2y = - 4  

y = -2

Hence, the solution for the given two system of equations is (-3, -2)

You might be interested in
The cost of 12 pounds of apples costs $35.50. What is equation for the cost in dollars, d, for the cost of a pound, p of apples
eduard

Answer:

12p = 35.50d

Step-by-step explanation:

If you like my answer than please mark me brainliest thanks

8 0
2 years ago
Read 2 more answers
When a number, half of the number, and a third of the number are added together, the
Finger [1]

Step-by-step explanation:

Let the number be x.

Half of a number is x/2 and a third of the number is x/3

ATQ,

x+\dfrac{x}{2}+\dfrac{x}{3}=275\\\\\dfrac{6x+3x+2x}{6}=275\\\\\dfrac{11x}{6}=275\\\\x=\dfrac{275\times 6}{11}\\\\x=150

Frist no is 150

Second no is 150/2 = 75

Third no is 50

8 0
3 years ago
Write a rule to describe each reflection.
Oksanka [162]

Answer: ok so if it is ok im sorry but like how is it like is there supposed to be a number? im sorryyy i thught i had it before i saw the picture

Step-by-step explanation:

6 0
3 years ago
What is the value of v in the equation?<br> V - 7 = 15 + 12<br><br> A.21<br> B.13<br> C.27<br> D.34
Serjik [45]

Answer:

D. 34

Step-by-step explanation:

15+12=27

v-7=27

+7. +7

______

v=34

3 0
2 years ago
What is 5 less than the product of 10 and c?
Finger [1]

Hi, the equation you typed is 10c-5

less than is subtraction and the product of two numbers is multiplying them together.

3 0
2 years ago
Other questions:
  • The sum of three consecutive even integers is -396. What is the largest of the three integers?
    12·1 answer
  • Which statement are true about the angles in the diagram? Check all that apply
    8·2 answers
  • Which is equivalent to 3 1/2
    10·2 answers
  • What is the value of x? <br> Answer options: 15, 35, 25, 30
    15·2 answers
  • Can someone please answer this!!!!
    6·1 answer
  • What is the radian measure of 205°? Express your answer as a fraction.
    11·1 answer
  • Whats the circumference of a circle if the radius is 1.5 show your work
    9·2 answers
  • A dental filling is nine carats what percent of the filling is gold?
    14·1 answer
  • A school is holding a carnival and hopes to raise $500. Child tickets cost $3 and adult
    10·1 answer
  • What is the value of X?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!