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
ELEN [110]
3 years ago
7

Which polynomial is factored completely? A.(4x+4) (x+1) B. 3n4 - 15n3 + 12n2 C. 121x2 + 36y D. 2x (x2-4)

Mathematics
1 answer:
morpeh [17]3 years ago
3 0
B. 3n^4 - 15n^3 + 12n^2
You might be interested in
20 points!!!
Svetlanka [38]
The answer is:  {4, 1} .
________________________________________________________
Explanation:
________________________________________
Given the equations:
________________________________________
      "12x = 54 −<span> 6y ;
     "-17x = -62 </span>− 6y ;
_________________________________________
Multiply the second equation (both sides) by "-1" ;
___________________________________________
  -1*{-17x = -62 − 6y} ;

to get: 

17x = 62 + 6y ;
___________________________________________
{Note: The reason we do this is that we notice the TWO "-6y" values; and by multiplying one of the entire equations by "-1" ; we can change said equation to an equation with a "(+6y)" value; and the "(+6y)" and the "(-6y)" values cancel out to "zero" ; providing an opportunity to isolate "x"; and to solve for "x".}.
___________________________________________
Now, rewrite the two equations:
___________________________________________

       12x = 54 − 6y ;
       17x = 62 +  6y ;
___________________________________________
↔  Rewrite; and then add the two together:

       6y + 62 = 17x 
      -6y + 54 = 12x 
____________________
       0  +  116 = 29x ;

↔ 29x = 116 ;

Divide EACH SIDE of the equation by "29" ; to isolate "x" on one side of the <span>equation ; and</span> to solve for "x" ;
________________________________________________
   29x / 29 = 116 / 29  ;
________________________________________________
to get:
________________________________________________
           x  = 4 .
______________________________________________
Now that we have the value for "x" , which is "4" ; let us plug in "4" for "x" for either of the original two equations, to solve for "y".  In fact, let us try substituing "4" for "x" ;  for BOTH of the two original equations; to see if the value is correct.
_____________________________________________
Our original two given equations are:
_____________________________________________
      "12x = 54 − 6y ;

     "-17x = -62 − 6y ;
_____________________________________________
 Let us start with the first equation:
 ________________________
      " 12x = 54 − 6y " ;
__________________________________
When "x = 4" ; what does "y" equal ?

Plug in "4" for "x" ; to solve for "y" ;

  12(4) = 54 − 6y ;

→ 48 = 54 − 6y ;

Subtract "54" from EACH SIDE of the equation;

→ 48 − 54 = 54 − 6y − 54 ;

to get:

→  -6 = -6y ; 

→ Divide EACH side of the equation by "-6" ; to isolate "y" on one side of the <span>equation ; and</span> to solve for "y" ; 

→ -6/-6 = -6y / -6 ;

to get:

1 = y ;  ↔ y = 1 ;  So, we have:  x = 4, y = 1 ;  or,  {4, 1}.
______________________________________________
Let us check to see, if the second (orginal equation) holds true when "x = 4" and "y = 1 " ;
______________________________________________
The second "original equation" given is:
______________________________________________
       " -17x = -62 − 6y " ;
______________________________________________
   →    -17(4) = ?  -62  − 6(1) ?

    →  -68 = ? -62 − 6 ?

    →  -68 = ? -68 ?  Yes!
________________________________________________________
The answer is:  {4, 1} .
________________________________________________________
4 0
2 years ago
Algebra question 2, Thanks if you help.
max2010maxim [7]
I think it is 60.05 if not im sorry
5 0
2 years ago
In the figure below angle y and angle x form vertical angles.Angle y forms a straight line with 60° angle and 70° angle right an
xxMikexx [17]

Answer:

x = 50

Step-by-step explanation:

The angles 70, 60, and y are supplementary, meaning that the sum of them is 180.  Therefore,

70 + 60 + y = 180 and

y = 50

That means that x = 50 as well, since vertical angles are congruent

3 0
2 years ago
100 POINTS! PLEASE HELP!!
Fudgin [204]

Step-by-step explanation:

yes it possible to find the length of tu

7 0
3 years ago
At maximum speed, an airplane tracked 1720 miles against the wind in 5 hours. Flying with the wind, the plane can travel the sam
nataly862011 [7]
Recall your d = rt, distance = rate * time.

as the plane goes against the wind, the plane is not really flying at "x" mph, but is really going slower, at " x - y ", because the wind is subtracting speed from it.

likewise, when the plane is going with the wind, is not really going at "x" mph, but at " x + y ", is going faster due to the wind, thus

\bf \begin{array}{lccclll}&#10;&\stackrel{miles}{distance}&\stackrel{mph}{rate}&\stackrel{hours}{time}\\&#10;&------&------&------\\&#10;\textit{against the wind}&1720&x-y&5\\&#10;\textit{with the wind}&1720&x+y&4&#10;\end{array}&#10;\\\\\\&#10;\begin{cases}&#10;1720=(x-y)5\implies \frac{1720}{5}=x-y\\\\&#10;344=x-y\implies \boxed{y}=x-344\\&#10;---------------\\&#10;1720=(x+y)4\implies \frac{1720}{4}=x+y\\\\&#10;430=x+y\implies 430=x+\left( \boxed{x-344} \right)&#10;\end{cases}&#10;\\\\\\&#10;430=2x-344\implies 774=2x\implies \cfrac{774}{2}=x\implies 387=x
6 0
2 years ago
Other questions:
  • Round 9,287 to the nearest ten
    10·2 answers
  • What would the next figure in the geometric pattern below be?
    13·1 answer
  • If your total is $19.48 and the tax is $9.25 what is the total amount
    12·2 answers
  • Find all zeros of ƒ(x) = x^3 + 2x^2 – x – 2. Then determine the multiplicity at each zero. State whether the graph will touch or
    12·1 answer
  • 2. Higher Order Thinking Jordan needs
    13·1 answer
  • Based on the limited amount of available student parking spaces on the GSU campus, students are being encouraged to ride their b
    9·1 answer
  • How do you delete a question on here
    11·1 answer
  • What are the quartiles of the data represented by the box-and-whiskers graph shown.
    6·1 answer
  • The slope of the line
    12·1 answer
  • Can someone help me !
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!