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
Romashka [77]
3 years ago
7

PLEASE HELP 11 points

Mathematics
1 answer:
tatuchka [14]3 years ago
6 0

Answer:

12.56

Step-by-step explanation:

You might be interested in
Solve 2x3 + x2 - 15x completely by factoring.
zhuklara [117]
Answer:  [D]:  " x = 0, -3, 5/2 "  .

{Assuming:  " 2x³ + x²  − 15x = 0 ".}.
__________________________________________
Explanation:
___________________________________
Given:
_________________________________
     2x³ + x² − <span>15x ;
 __________________________________
</span>        →  (2x³ + x²) − 15x ;
  
        →   2x³ + x² − 15x  =   x * (2x² + x − 15) ;
         
        →  Factor the expression:  "(2x² + x − 15)" ;
                                     
             → (2x² + x − 15) =  
            
            →   2x² − 5x + 6x − 15 ;

           →  Add the "first TWO (2) terms", and pull out the "like factors" ;                                       →  x*(2x − 5) ;

           →  Add the "last TWO (2) terms, pulling out "common factors";
                            →  3*(2x − 5) ;

           →  Now, add up the previous FOUR (4) terms; to get:

                            → (x + 3)(2x − 5) ;  

           → Now, we have factored the:

                    "(2x² + x − 15)" of:  " x*(2x² + x − 15) " ; 

           →  So we add the "x"; and write the entire factored expression:
______________________________________________________
                      →  x*(x + 3)(2x − 5) ;           
_____________________________________
Now, assume the question is asking to solve for "x" by factoring;
   when the expression is "equal to zero" ;
_______________________________________
That is, when:  

                →  x*(x + 3)(2x − 5) = 0 ;
____________________________________________
Since we have THREE (3) multiplicands;  and anything times "0" equals "0" ;
    this equation holds true when:
________________________________
  1) x = 0 ;
_______________
  2) (x + 3) = 0 ;
  
Subtract "3" from each side of the equation;

   x + 3 − 3 = 0 − 3 ; 
  
         x = -3 ; 
_______________________
3)  2x − 5 = 0 ; 

Add "5" to each side of the equation;

2x − 5 + 5 = 0 + 5 ;

2x = 5 ; Now, divide EACH side of the equation by "2" ; to isolate "x" on one side of the equation; and to solve for "x" ; 

2x/2 = 5/2 ;

x = 5/2; or, write as 2.5; or write as 2<span>½ .
</span>_____________________________________
Put simply, the equation is true when:
_________________________________________
    x = 0, -3, 5/2 ;  which is: Answer choice: [D].
_________________________________________

7 0
3 years ago
Simplify (x - y + 1) - (x + y - 1)
bulgar [2K]
<span>(x - y + 1) - (x + y - 1)

x - y + 1 - x - y + 1

= (x - x) + (y - y) + (1 + 1)

= -2y + 2

In short, Your Answer would be: -2y + 2

Hope this helps!</span>
3 0
3 years ago
Read 2 more answers
X/8 - 9 = 1 Solve for x
mestny [16]

Answer:

x=80

Step-by-step explanation:

  • x/8-9=1
  • x/8=9+1
  • x/8=10
  • x=80

7 0
3 years ago
What is the coefficient in the algebraic expression 7 xy2 ?
Monica [59]
The answer is 7!

The number In front of the variable is always the coefficient.
5 0
3 years ago
We know that a token costs $1.75. If you purchase 10 tokens, you get 2 free tokens. Write and solve an equation to find the appr
Bad White [126]

Answer:

c=(10)($1.75)/12

c=$17.50/12

c=$1.458 which rounds to $1.46 per token

3 0
3 years ago
Other questions:
  • Evaluate the expression for p = 3 and q = 4: <br><br> pq/3 - q/2
    12·2 answers
  • What would a persons speed if they travelled 394 meters in 94 seconds?
    15·1 answer
  • What id the GCF for 81 and 64
    9·2 answers
  • Can someone please solve this fast? thanks !
    8·1 answer
  • Solve the problem and enter your answer below.<br> What is 14% of 55?
    12·2 answers
  • Christy is paid time-and-half hours worked in excess for 40 hours and double time for hours worked on Sunday. If Christy had gro
    8·1 answer
  • Alex's batting average is 0.346 What is his batting average rounded to the nearest hundredth?
    14·1 answer
  • Sal bought a house for 78,524.60 Twelve years later he sold the house for 2 2/3 times as much. What was the sale price of the ho
    13·1 answer
  • Donald bought a box of golf balls for $9.30. There were 18 golf balls in the box. About how much did each golf ball cost? Rename
    6·1 answer
  • If x+5z=10, then x=10-5z is what math property
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!