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
jasenka [17]
3 years ago
13

What is the solution of the system?

Mathematics
1 answer:
spin [16.1K]3 years ago
6 0
The Answer is b: x = 18, y = -20

Proof:

Solve the following system:
{4 x + 3 y = 12 | (equation 1)
{7 x + 5 y = 26 | (equation 2)

Swap equation 1 with equation 2:
{7 x + 5 y = 26 | (equation 1)
{4 x + 3 y = 12 | (equation 2)

Subtract 4/7 × (equation 1) from equation 2:
{7 x + 5 y = 26 | (equation 1)
{0 x+y/7 = (-20)/7 | (equation 2)

Multiply equation 2 by 7:
{7 x + 5 y = 26 | (equation 1)
{0 x+y = -20 | (equation 2)

Subtract 5 × (equation 2) from equation 1:
{7 x+0 y = 126 | (equation 1)
{0 x+y = -20 | (equation 2)

Divide equation 1 by 7:
{x+0 y = 18 | (equation 1)
{0 x+y = -20 | (equation 2)

Collect results:

Answer: {x = 18, y = -20
You might be interested in
M is the midpoint of segment GR. G has coordinates (11,-5) and M is (4,-4) Find the coordinates of R
7nadin3 [17]

Answer:

  • (3, -3)

Step-by-step explanation:

<u>Given:</u>

  • G = (11,-5)
  • M = (4,-4)
  • R = ?

<u>Solution</u>

  • R(x, y)

<u>As per midpoint formula;</u>

  • 4 = (11 + x)/2  ⇒ x + 11 = 8 ⇒ x = 3
  • -4 = (-5 + y)/2 ⇒ y - 5 = -8 ⇒ y = -3
  • R = (3, -3)
4 0
3 years ago
What is the value of p?
arsen [322]
P=0.6441+0.29=0.9341 (D)
5 0
4 years ago
Q. Unscramble the following term related to algebra:- ROTPORAE.​
ASHA 777 [7]

Answer:

operator

Step-by-step explanation:

Operator is represented as any symbol that indicates an operation to be performed.

Examples:

- Square root of√x, which indicates the square root is to be taken

- d/dx, which indicates differentiation with respect to x is to be performed

4 0
2 years ago
Read 2 more answers
What's carbon dioxide?
choli [55]

Answer:

Carbon dioxide is a chemical compound composed of one carbon and two oxygen atoms. It is often referred to by its formula CO2. It is present in the Earth's atmosphere at a low concentration and acts as a greenhouse gas.

Step-by-step explanation:

There is also more to know about this. It's also a chemical.

4 0
2 years ago
What is the value of 3n+1 when n=4<br> 7<br> 13<br> 8<br> 12
Leviafan [203]
3n+1= 13 when n=4
29 when n=7
43 when n=13
25 when n= 8
37 when n= 12

5 0
3 years ago
Other questions:
  • Please solve question above
    7·2 answers
  • HELP! WILL GET 30 POINTS!
    9·2 answers
  • Your teacher purchases 24 pastries for a class celebration,for $2 each. Which integer expresses the amount he paid?
    6·1 answer
  • What is the nth term of the geometric sequence 4, 8, 16, 32, ... ?
    9·1 answer
  • Meg brought 2 magazines and 3 sodas and spent between $30 and $5. Each magazines costs the same amount. Each soda cost the same
    10·1 answer
  • Brainliest for the correct answer ​
    14·1 answer
  • a shopkeeper had 60 kg apples with him in the morning of a particular day during the day time he could sell only 43 kg 700 gram.
    14·1 answer
  • Yesterday, there were 40 problems assigned for math homework. Gavin got 28 out of 40 problems correct. What percentage did Gavin
    9·2 answers
  • Which sentence can represent the inequality 2.4 (6.2 minus x) greater-than negative 4.5?
    12·2 answers
  • What is the length of the side of a square that has an area of<br> 49 square centimeters
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!