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
Zolol [24]
3 years ago
7

Explain two methods for solving an equation. Give an example.

Mathematics
1 answer:
svlad2 [7]3 years ago
7 0

For solving system of equations, we can use either substitution where we plug one equation into the other, or elimination where we combine the equations.


- Using elimination, you would to eliminate one variable from both equations, so you automatically would get one equation with one variable!


- Using substitution means you are going to solve one equation for one variable and substitute with its value in the other equation in order to get also an equation with one variable.



Let's take an example ...

y+x=2            and      y-2x = 1

<span>Using <span>elimination, we need to subtract these two equation; one from the other...

y+x=2
-
y-2x=1
-----------
0+3x=1

then x=1/3       

and then substitute into any equation to get y-value</span></span>
y+x=2
y+1/3 = 2        >>>>>    y=5/3



NOW...<span>Using substitution
</span>y+x=2            and      y-2x = 1 >>(y=1+2x)

Plug (y=1+2x) into y+x=2    and solve for x
y+x=2
(1+2x) + x =2
1+3x = 2
3x=1

again (and for sure) x = 1/3

plug in x=1/3 into any of the equations above to get y:
y+x=2
y+1/3=2
y=5/3


DOne  !!!!!!


I hope you got the idea

If you still need help, just let me know.




You might be interested in
X2 + y2 - 14x + 10y + 65 = 0 <br><br> will lie ENTIRELY in Quadrant
Afina-wow [57]
Rearranging to standard form 
= (x - 7)^2 + (y + 5)^2 = -65 + 49 + 25
 (x-7)^2 + (y+5)^2 = 9 
so the centre is at (7,-5) and the radius is 3

so the circle will be entirely in Quadrant 4.
5 0
3 years ago
Carlos is going to an amusement park for his 11th birthday with his 2 yr old brother and parents. His parents brought $100 to sp
amm1812
They have $49.00 left for desert because a ticket is $15 for each person 7 and older. So 15 × 3 people = $45.00. $1.50 per slice and they got 4 slices so 1.50 × 4 = $6.00. $45.00 + $6.00 = $51.00. $100 - $51 = $49.00
8 0
3 years ago
PLEASE HELP mE: Expand the expression 0.9(7x - 1) + 9?
Alex_Xolod [135]

Answer:

6.3x+8.1 simplify

Step-by-step explanation:

8 0
3 years ago
Find the first 3 iterations using f(x)=3x if you have an initial value of 1 show work
enot [183]

Answer:

You need to replace the x with the value that you want to evaluate. If the initial value is 1, you have to replace the x with1, then with 2, an finally with 3.

<em>Iteration 1.</em>

f(x=1)=3*(1)

f(x=1)=3

<em>Iteration 2.</em>

f(x=2)=3*(2)

f(x=2)=6

<em>Iteration 3.</em>

f(x=3)=3*(3)

f(x=3)=9

7 0
3 years ago
{(8.3), (-2.9), 7,5), (0.6)}<br> Is this a function
hodyreva [135]

Answer:

Yes, it is a function

8 0
3 years ago
Other questions:
  • Can someone help me with this
    13·1 answer
  • Kelly has 7 1/4 yards of rope. She cuts 3 inches off each end of the rope. Kelly will divide the remaining rope into 5 equal pie
    12·1 answer
  • Help!!!!!!!!!!!!!!!!!!!!!!!!!!
    10·2 answers
  • A die is rolled twice
    10·1 answer
  • A 6% sales tax charged on a $43.50 Item. How much is paid for the item altogethe
    9·2 answers
  • AB formed by (-3, 8) and (3, 2) and CD formed by (7.1) and (5, -1). Are these
    14·1 answer
  • Directions: Solve for x.<br> Please help
    5·1 answer
  • Please help it will help a lot i really need this!!
    10·1 answer
  • Pls helppppppppp!!!!!!!!!! (Jesus loves u)
    11·2 answers
  • A particular battery claims to have a mean life of 400 hours with a standard deviation of 30 hours. Approximately what percent o
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!