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
disa [49]
4 years ago
11

Subtitute 2x+y=7 and 3x-y=8

Mathematics
1 answer:
iogann1982 [59]4 years ago
8 0

Answer:

x = 3 , y = 1

Step-by-step explanation:

2x + y = 7

3x + y = 8

solution

2x + y = 7-----------(1)

3x - y = 8------------(2)

from equation 1

2x + y = 7

y = 7 - 2x-------------(3)

substitute equation 3 into equation 2

3x - y = 8

3x - (7 - 2x) = 8

3x - 7 + 2x = 8

3x + 2x = 8 + 7

5x = 15

divide through by the coefficient of x

5x/5 = 15/5

x = 3

to find y

substitute x into equation 1

2x + y = 7

2(3) + y = 7

6 + y = 7

y = 7 - 6

y = 1

You might be interested in
Factor 125x9 +64.
pogonyaev

~~~~125x^9+64\\\\=(5x^3)^3+4^3\\\\=(5x^3 +4)[(5x^3)^2 - (5x^3)(4) + 4^2]\\\\=(5x^3 +4)(25x^6-20x^3+16)

5 0
2 years ago
What is the value of In e^4?<br> A.0<br> B.1<br> C.2<br> D.4
Colt1911 [192]

Answer:

d. 4

Step-by-step explanation:

lne^4 s the same as log base e of e^4. when you convert it to exponent notation, you get e^4=e^4, therefore lne^4=4

3 0
4 years ago
Can someone help me‼️
yaroslaw [1]

Answer:

55°

Step-by-step explanation:

180° - 125° = 55°

so angle 2 is 55 degrees

4 0
3 years ago
Read 2 more answers
Factor completely
luda_lava [24]

Answer:

B)

B)

D)

Step-by-step explanation:

1. 7x^3y+14x^2y^3-7x^2y^2

The GCF of all the term of the above polynomial is 7x^2y , hence we take it outside and form a bracket

7x^2y(x+2y^2-y)

The polynomial within the bracket can not be factorized further hence this is our final answer. Option (B) is the right answer

2. 5x(x+3)+6(x+3)

The GCF of all the term of the above polynomial is (x+3) , hence we take it outside and form a bracket

(x+3)(5x+6)

The polynomial within the bracket can not be factorized further hence this is our final answer. Option (B) is the right answer

3. 8x^5+2x^4+4x^2

The GCF of all the term of the above polynomial is 2x^2 , hence we take it outside and form a bracket

2x^2(4x^3+x^2+2)

The polynomial within the bracket can not be factorized further hence this is our final answer. Option (D) is the right answer

4 0
3 years ago
2 questions i need help with thanks!
aleksley [76]

Answer:

c for both

Step-by-step explanation:

8 0
3 years ago
Other questions:
  • What number is represented by 2.55 x 10-4?<br><br> 255<br><br> 2,550<br><br> 0.255<br><br> 0.000255
    15·1 answer
  • If you know that two legs of a right triangle are 7 and 16 units long, what is the triangle's area? If necessary, round your ans
    10·1 answer
  • What is 3 × 8000283743729.
    13·2 answers
  • Which of the following points lie in the solution set to the following system of inequalities? y ≤ x − 5 y ≥ −x − 4
    11·2 answers
  • Please help! i will be giving brainliest!!!
    5·2 answers
  • For the function y=4x-11, what is the output when the input is 10?
    5·1 answer
  • A triangle has a base of 6 meters and a height of 8 meters. What is the area of the triangle?
    6·2 answers
  • Describe the steps you would take to solve the
    7·2 answers
  • there are 64 squares on a chessboard. Each square on a tournament chessboard measures 2.25 x 2.25 inches. A travel chessboard is
    5·2 answers
  • The area of an airplane ticket is 60 square centimeters. The perimeter is 34 centimeters. What are the dimensions of the ticket?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!