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
Sonbull [250]
3 years ago
11

Can someone help me understand how to solve a two variable equation I am really lost

Mathematics
1 answer:
Llana [10]3 years ago
7 0
Easiest method solving 2 unknowns is Substitution. 
So there will normally be 2(ormore)equations given. 
Say 
X+Y= a
 bX=cY + d 
a b c d are numbers they give
So first we rearrange the first equation
X  = a - Y 
No we substitute this into the 2nd equation so that we can get Y
since we know X = a-Y, 
b(a-Y) = cY + d 
we rearrange and we can find Y for this, it is just Y and numbers
hence finding Y, we sub the value for Y into X = a-Y and we get X also . 

You might be interested in
One card is randomly selected from a deck of cards. find the odds in favor of drawing a club.
Oksi-84 [34.3K]
->Calculate chance for geting any one card in deck, set a proportion
52(total amount of cards) : 100%(total=100%)=1(any one random card) : X%
X=1.9%
->then multiply percentage of any one card with how many clubs are in the deck, there are 13 clubs
X%•13=24.7% chance of getting clubs
Solution is rounded



6 0
3 years ago
Read 2 more answers
1.<br> 12 pizzas cost $20. What will 20 pizzas<br> costa
Brut [27]

Answer:

$33.33 (rounded to nearest cent)

Step-by-step explanation:

12 pizzas --- $20

20 pizzas --- \frac{20}{12} × $20 = $33.33 (rounded to nearest cent)

4 0
3 years ago
Read 2 more answers
The table represents a function.
Elenna [48]

f(5) is -8 ⇒ 1st answer

Step-by-step explanation:

Function is a relation between set of of ordered pairs (x , y),and every x has only one y

Examples:

  • {(-1 , 2) , (2 , 4) , (5 , -3)} is a function because x = -1 has only y = 2, x = 2 has only y = 4 and x = 5 has only y = -3
  • {(-2 , 4) , (0 , -1) , (-2 , 5)} is not a function because x = -2 has y = 4 and 5

The notation of the function is f(x) = y

The table:

→    x     :    f(x)

→    -4    :    -2

→    -1     :    5

→     3    :    4

→     5    :   -8

From the table

∵ x = -4

- The corresponding value of y to x = -4 is -2

∴ f(-4) = -2

∵ x = -1

- The corresponding value of y to x = -1 is 5

∴ f(-1) = 5

∵ x = 3

- The corresponding value of y to x = 3 is 4

∴ f(3) = 4

∵ x = 5

- The corresponding value of y to x = 5 is -8

∴ f(5) =-8

f(5) is -8

Learn more:

You can learn more about the functions in brainly.com/question/10879401

#LearnwithBrainly

3 0
3 years ago
I need help getting the answer
valentina_108 [34]

Answer:

Step-by-step explanation:

The center is at (2,-7). The radius is 2.

(x-2)² + (y+7)² = 2²

3 0
3 years ago
What's the length of AB?​
Nastasia [14]
Use the pythagorean theorem to solve this: a^2 + b^2 = c^2.
You already have a and b which are 3 and 4. Square them up and you will get 9 + 16 = c^2.
Add.
25 = c^2
Lastly, square root both sides.
5 = c
The length of AB is 5.
8 0
2 years ago
Other questions:
  • a magazine has 5580000 subscribers this year. This number is down 7% from last year. How many subscribers were there last year?
    6·2 answers
  • 19/25 as a decimal<br><br><br> =&gt;
    13·1 answer
  • A window is 12 feet above the ground. A ladder is placed on the ground to reach the window. If the bottom of the ladder is place
    14·2 answers
  • What is 35 million in scientific notation
    9·1 answer
  • I'm studying for a test and I need help with percentages I don't understand it at all. for example A pair of shoes was $56 and i
    6·1 answer
  • 4 - 5h verbal expression
    12·2 answers
  • write an equation for the sentence. (Do not use any spaces) six times the sum of a number and five is 16​
    15·2 answers
  • 600 divided by what gives you 3???
    11·1 answer
  • can anyone help and explain why this is either proportional or not? urgent!! (it needs an explanation too)
    13·1 answer
  • Erik read a total of 4 books over 2 months. After belonging to the book club for 17 months, how many books will Erik have read i
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!