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
Genrish500 [490]
3 years ago
14

Solve the system of equations by substitution

Mathematics
1 answer:
scoundrel [369]3 years ago
7 0

Answer:

(x, y) = (1, 3)

Step-by-step explanation:

given the 2 equations

x + y = 4 → (1)

y = 3x → (2)

Substitute y = 3x into (1)

x + 3x = 4

4x = 4 ( divide both sides by 4 )

x = 1

Substitute x = 1 into (2) for corresponding value of y

y = 3 × 1 = 3

solution is (1, 3 )


You might be interested in
What is the rate of change?<br>Jose has $6 and saves $1 a day.​
Len [333]

Answer:

The rate of change is 1$

Step-by-step explanation:

Jose is getting one dollar a day (the only thing in the equation that is changing)

8 0
3 years ago
The function y = -x - 1 and y = ½x + k intersect at the point (-2,1). Find the value of k.
horrorfan [7]

Answer:

  k = 2

Step-by-step explanation:

Fill in the given point values and solve for k.

  y = (1/2)x + k

  1 = (1/2)(-2) +k . . . . . . for x = -2, y = 1

  1 = -1 +k . . . . simplify; next, add 1

  2 = k

5 0
4 years ago
3(x-5)=6 What is the answer?​
seraphim [82]

Step-by-step explanation:

3(x - 5) = 6

x - 5 = 2 (divide 3 on both sides)

x = 7 (add 5 on both sides)

The solution is x = 7.

8 0
3 years ago
Read 2 more answers
Gemma, a scuba diver, begins a dive on the side of a boat 4 feet above sea level. She descends 28 feet. Which integer represents
nadezda [96]

Answer:

-24

Step-by-step explanation:

4 feet above sea level is +4

she descends 28 feet that is -28

-28 + 4 = -24

7 0
3 years ago
Read 2 more answers
Triangle ABC is similar to triangle LMN by the AA Similarity Postulate.
abruzzese [7]
<span>Triangle ABC being similar to triangle LMN by the AA similarlity postulate means that m<A = m<L; m<B = m<M; m<C = m<N. Let m<M = x, then 81 + x + 2x = 180; 3x = 180 - 81 = 99. x = 99 / 3 = 33. Therefore, m<M = 33 degrees.Hope this helps. Let me know if you need additional help!</span>
4 0
3 years ago
Other questions:
  • Find the values of x and y.
    13·1 answer
  • Please help...Need help asap
    13·1 answer
  • wendy cut a board into 4 pieces of equal sizes to make a table. which fraction of the whole board does each piece represent.​
    6·2 answers
  • Susan can read 15 pages in 45 minuets. How many pages can she read in 60 minutes
    6·1 answer
  • The sum of two numbers is 52 and the difference is 14. What are the numbers?
    12·2 answers
  • What is the answer for this?
    12·1 answer
  • Please help!! 10 points.
    7·1 answer
  • Q. Which equation best represents the relationship between x and y in<br>the graph?​
    12·1 answer
  • Question 7
    10·1 answer
  • what is the equation of the line that is parallel to the given line and passes through the point (-3,2)? no links.
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!