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
Sphinxa [80]
3 years ago
9

if you were to solve the following system by substitution what would be the best variable to solve and from what equation? 2x+8y

=12 3x-8y=11

Mathematics
1 answer:
Nina [5.8K]3 years ago
4 0
All the numbers in the first equation have a common factor of 2. Removing that gives
.. x +4y = 6
making it easy to solve for x
.. x = 6 -4y

My choice would be to solve for x using the first equation.

_____
On second thought, it might actually be easier to solve either equation for 8y. That term then directly substitutes into the other equation (equivalent to adding the two equations).
.. 8y = 3x -11 . . . . . from the second equation
.. 2x +(3x -11) = 12 . . . substituting into the first equation
.. 5x = 23 . . . . . . . . . . collect terms, add 11 (what you would get by adding the equations in the first place)
.. x = 4.6
.. y = (3*4.6 -11)/8 = 0.35

You might be interested in
Whats the median of (20, 15, 14, 16, 17, 12, 20, 22)
Tatiana [17]

Answer:

16.5

Step-by-step explanation:

Given data to us is ,

  • 20, 15, 14, 16, 17, 12, 20, 22 .

Arrange it in ascending order .

= 12 , 14 , 15 , 16 , 17 , 20 , 20 , 22

The middle most observation will be median in case n is odd and average of middlemost observations if n is even , that is n = 8 .

=> Middlemost observations = 16 , 17

=> Mean = 16 + 17 /2 = 33/2 = 16.5

5 0
2 years ago
Factor this trinomial completely. 2x2 + 6x + 4 O
svp [43]

Answer:

B.  2(x+2)(x+1)

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
Find GCF of 5x^5 and 64x^2
Naddika [18.5K]

Answer:

4121x

Step-by-step explanation:

5x^5 + 64x^2

25x+4096x

4121x

8 0
3 years ago
Animal researchers studying cows and horses conducted a two-sample t-test for a difference in means to investigate whther grazin
qaws [65]

Answer: Reject the null hypothesis because the p-value is less than 0.05

Step-by-step explanation:

8 0
3 years ago
Given: O is the midpoint of line MN<br> OM=OW<br> Prove: OW=ON
grigory [225]
Given:
O is the midpoint of line MN
OM = OW

To prove:  OW = ON

<u>Statement</u>                                 <u>Reason</u>
1> OM = OW  -------------------------> Given
2> OM = ON ---------------------------> O is the midpoint of line MN
                                                           i.e Point O bisects line MN
3> OM = OW --------------------------> From statement <1>
4> ON = OW  -------------------------> OM = ON (Statement <2>)
     OW = ON
              
                                                                    <u>proved!!</u>
   


6 0
3 years ago
Other questions:
  • 5 Raymond was riding a zip-cable from the top of a viewing post. The cable is 75 yards long. The viewing post is 60 yards high a
    12·2 answers
  • Find the percent of:<br><br> 17% of 155 and.....<br><br> 24% of 780
    14·1 answer
  • Twice a number decreased by four is greater than ten, what numbers satisfy this condition?
    7·2 answers
  • Find 2 possible factors for the estimated product: 2,800
    9·1 answer
  • One real life application of circles is?
    12·1 answer
  • What is the diameter of the smallest circle that would enclose 2,000 pennies?
    12·1 answer
  • Please solve these two questions!
    11·1 answer
  • Does anyone know the answer to question 3
    5·1 answer
  • Need help will mark brainliest...
    7·1 answer
  • Roland said it is possible to make a triangle from the following lengths: 31 inches, 70
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!