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
Ostrovityanka [42]
4 years ago
15

Solve for x & y: x^2+y^2=20. 3x+y=2

Mathematics
2 answers:
Norma-Jean [14]4 years ago
6 0
You're solving a system here, easy peasy. Solve the second equation for y to get y = 2 - 3x. Now in the first equation, sub in this y value where you see a y and now the equation is in terms of x only: x^2 + (2-3x)^2 = 20. You have to FOIL out the (2-3x)^2 first to get x^2 + 4 - 12x + 9x^2 = 20. Now combine like terms to get 10x^2 - 12x + 4 = 20. Move the 20 over by subtraction to get
10x^2 - 12x - 16 = 0. Factor this now, taking a 2 out first: 2(5x^2 - 6x -8)=0 and you get factors of 2(x-2)(5x+4)=0. x=2 or x = -4/5. If x = 2, then y = -4. If x = -4/5, then y = 22/5
Lerok [7]4 years ago
5 0

Answer:

1

Step-by-step explanation:


You might be interested in
Which expression is equivalent to 7^5/7^2
PolarNik [594]

Answer:

You are correct my good sir! 7^5/7^2 expanded is (7x7x7x7x7)/(7x7)! another awesome thing to know for future reference is when dividing exponents with the same base you can simply subtract the exponents from each other! for example, 7^5/7^2=7^3! :D Hope This Helps!

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
There are 5280 feet in a mile. What fraction is represented by 240 feet?
Sauron [17]

The fraction would be the portion over the total:

240 / 5280

Divide both top and bottom by 240 and the fraction simplifies to 1/22

The answer is 1/22

7 0
3 years ago
Find the value of the logarithm Log 182 round answer to the nearest thousandth
Tresset [83]

log(182)=log(2*7*13)

As, log(m*n)=log(m)+log(n)

log(2*7*13)=log(2)+log(7)+log(13)

=0.301029+0.845098+1.13943

=2.26007

=2.260(approximate)

6 0
4 years ago
Read 2 more answers
Time between 22:30 and 04:20
Svetlanka [38]
The answer would be 5 hours and 50 minuets. It would be this because 2230 equals 10:30 count the hours between 1030 and 430 6 hrs then minus 10 min because the last hr isnt a full hour because it doesnt make it to 430.
7 0
3 years ago
Can someone help plz
goldfiish [28.3K]

Answer:

Sr i dont know

Step-by-step explanation:

3 0
3 years ago
Other questions:
  • Penny has some money. After
    13·2 answers
  • Write a the equation of a line perpendicular to the line y=-7 and goes through the point (-2,3)
    9·1 answer
  • n San Francisco, 30% of workers take public transportation daily. In a sample of 10 workers, what is the probability that exactl
    14·1 answer
  • Evaluate: (9/64)^1/2
    10·2 answers
  • Do the following side lengths form a right triangle?<br><br> 7,24,25
    5·1 answer
  • A. Find the value of x that maximizes the area of the figure.
    7·1 answer
  • 1/5 ( 15 + 10k ) = please help and make sure your answer is accurate.
    13·1 answer
  • The cost of a customer's smartphone bill can be modeled by
    7·1 answer
  • Evaluate the sum from n equals four to ten of quantity five n plus two.
    11·1 answer
  • Find the number of possible outcomes in the sample space.<br> You flip a coin once.
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!